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	<title>opuntia.biz &#187; A-shell-power</title>
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	<description>Piccoli appunti per grandi appassionati di sistemi open source ...</description>
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		<item>
		<title>Installazione di VMware Player per Linux da console</title>
		<link>http://opuntia.biz/2012/02/01/installazione-di-vmware-player-per-linux-da-console/</link>
		<comments>http://opuntia.biz/2012/02/01/installazione-di-vmware-player-per-linux-da-console/#comments</comments>
		<pubDate>Tue, 31 Jan 2012 23:34:17 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[Linux tips]]></category>
		<category><![CDATA[Virtualizzazione e dintorni ...]]></category>

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		<description><![CDATA[Mettiamo il caso che dobbiamo installare un prodotto come VMware Player (prodotto che usualmente deve essere installato sotto Xserver) ma siamo lontani ed abbiamo solo la shell a disposizione. Linux permette questo ed altro ! Basta lanciare l&#8217;installazione del programma ed a seguire &#8220;&#8211;console&#8221; &#8230; ./VMware-Player-4.0.2-591240.i386.bundle &#8211;console Et voilà ! L&#8217;installazione è servita !<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=2323&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Mettiamo il caso che dobbiamo installare un prodotto come VMware Player (prodotto che usualmente deve essere installato sotto Xserver) ma siamo lontani ed abbiamo solo la shell a disposizione.<br />
Linux permette questo ed altro !<br />
Basta lanciare l&#8217;installazione del programma ed a seguire &#8220;&#8211;console&#8221; &#8230;</p>
<blockquote><p>
./VMware-Player-4.0.2-591240.i386.bundle  &#8211;console
</p></blockquote>
<p>Et voilà ! L&#8217;installazione è servita !</p>
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			<media:title type="html">BoB</media:title>
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		<item>
		<title>Filtrare le &#8220;ricevute di ritorno&#8221; con Postfix e Procmail (magari utilizzando Maildir &#8230;)</title>
		<link>http://opuntia.biz/2011/09/27/filtrare-le-ricevute-di-ritorno-con-postfix-e-procmail-magari-utilizzando-maildir/</link>
		<comments>http://opuntia.biz/2011/09/27/filtrare-le-ricevute-di-ritorno-con-postfix-e-procmail-magari-utilizzando-maildir/#comments</comments>
		<pubDate>Tue, 27 Sep 2011 14:29:49 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[CentOS]]></category>
		<category><![CDATA[Linux tips]]></category>
		<category><![CDATA[Posta elettronica]]></category>
		<category><![CDATA[Ubuntu/Debian]]></category>

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		<description><![CDATA[Chi non ha odiato le &#8220;ricevute di ritorno&#8221; delle mail ? Di sicuro hanno una affidabilità parziale perchè l&#8217;utente deve cliccare su &#8220;invia la ricevuta&#8221;. Ma questo non ci fornisce la certezza che il destinatario effettivamente abbia letto la nostra mail. Se, poi, spediamo massivamente mail con ricevuta di ritorno ci ritroveremo inondati di mail <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=2314&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Chi non ha odiato le &#8220;ricevute di ritorno&#8221; delle mail ?<br />
Di sicuro hanno una affidabilità parziale perchè l&#8217;utente deve cliccare su &#8220;invia la ricevuta&#8221;. Ma questo non ci fornisce la certezza che il destinatario effettivamente abbia letto la nostra mail.<br />
Se, poi, spediamo massivamente mail con ricevuta di ritorno ci ritroveremo inondati di mail &#8230;<br />
Linux con i suoi potenti mezzi ci mette a disposizione gli strumenti.<br />
Partiamo da una configurazione &#8220;complessa&#8221;: abbiamo un server mail con Postfix ed abbiamo &#8220;approfittato&#8221; delle sue grazie utilizzando Maildir (ovvero ogni singola mail è identificata da un singolo file di testo &#8211; situazione comodissima per bypassare la limitazione ed i rischi dati dall&#8217;utilizzo dello standard Mailbox).</p>
<p>Iniziamo con la configurazione di Postfix editando il file /etc/postfix/main.cf</p>
<blockquote><p>
vi /etc/postfix/main.cf
</p></blockquote>
<p>ed andiamo a cercare il parametro &#8220;mailbox_command&#8221; andandolo a modificare in questo modo:</p>
<blockquote><p>
mailbox_command = /usr/bin/procmail -a &#8220;$EXTENSION&#8221; DEFAULT=/home/$USER/Maildir/ MAILDIR=/home/$USER/Maildir/
</p></blockquote>
<p>Successivamente entriamo nell&#8217;utente che ci ha richiesto il filtraggio ed andiamo a creare il file &#8220;.procmailrc&#8221;</p>
<blockquote><p>
vi .procmailrc
</p></blockquote>
<p>Mettiamo ora all&#8217;interno del file le nostre regolette <img src='http://s0.wp.com/wp-includes/images/smilies/icon_biggrin.gif' alt=':D' class='wp-smiley' /> </p>
<blockquote><p>
#directory<br />
MAILDIR = $HOME/Maildir/   # Le email finiranno qui</p>
<p># sposta le ricevute di lettura in<br />
# /home/utente/Maildir/.Notifiche\ lettura/</p>
<p>:0<br />
* ^Subject.*Letto:*<br />
#/dev/null<br />
/home/utente/Maildir/.Notifiche\ lettura/</p>
<p>:0<br />
* ^Subject.*Read -*<br />
#/dev/null<br />
/home/utente/Maildir/.Notifiche\ lettura/</p>
<p>:0<br />
* ^Subject.*Notification for*<br />
#/dev/null<br />
/home/utente/Maildir/.Notifiche\ lettura/</p>
<p>:0<br />
* ^Subject.*Recapitato:*<br />
#/dev/null<br />
/home/utente/Maildir/.Notifiche\ lettura/</p></blockquote>
</blockquote>
<p>Et voila ! Il filtraggio è servito !!!</p>
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			<media:title type="html">BoB</media:title>
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		<title>Installare VMware Tools su VMware ESXi+Centos</title>
		<link>http://opuntia.biz/2010/03/17/installare-vmware-tools-su-vmware-esxicentos/</link>
		<comments>http://opuntia.biz/2010/03/17/installare-vmware-tools-su-vmware-esxicentos/#comments</comments>
		<pubDate>Wed, 17 Mar 2010 14:48:01 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[CentOS]]></category>
		<category><![CDATA[Linux tips]]></category>
		<category><![CDATA[Virtualizzazione e dintorni ...]]></category>

		<guid isPermaLink="false">http://opuntia.biz/?p=485</guid>
		<description><![CDATA[rpm &#8211;import http://packages.vmware.com/tools/VMWARE-PACKAGING-GPG-KEY.pub vi /etc/yum.repos.d/CentOS-Base.repo [vmware-tools] name=VMware Tools for Red Hat Enterprise Linux $releasever – $basearch #baseurl=http://packages.vmware.com/tools/esx//rhel5/ baseurl=http://packages.vmware.com/tools/esx/4.0u1/rhel5/i686/ enabled=1 gpgcheck=1 yum install vmware-tools<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=485&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<blockquote><p>
rpm &#8211;import http://packages.vmware.com/tools/VMWARE-PACKAGING-GPG-KEY.pub
</p></blockquote>
<blockquote><p>
vi /etc/yum.repos.d/CentOS-Base.repo</p>
<p>[vmware-tools]<br />
name=VMware Tools for Red Hat Enterprise Linux $releasever – $basearch<br />
#baseurl=http://packages.vmware.com/tools/esx//rhel5/<br />
baseurl=http://packages.vmware.com/tools/esx/4.0u1/rhel5/i686/<br />
enabled=1<br />
gpgcheck=1
</p></blockquote>
<blockquote><p>
yum install vmware-tools
</p></blockquote>
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			<media:title type="html">BoB</media:title>
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	</item>
		<item>
		<title>Best practices per &#8220;alzare&#8221; un nuovo server &#8230;</title>
		<link>http://opuntia.biz/2010/03/16/best-practices-per-alzare-un-nuovo-server/</link>
		<comments>http://opuntia.biz/2010/03/16/best-practices-per-alzare-un-nuovo-server/#comments</comments>
		<pubDate>Tue, 16 Mar 2010 16:56:49 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[CentOS]]></category>
		<category><![CDATA[Linux tips]]></category>

		<guid isPermaLink="false">http://opuntia.biz/?p=462</guid>
		<description><![CDATA[ARTICOLO IN <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=462&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<blockquote><p><strong>SSH</strong><br />
<em>/etc/ssh/sshd_config</em></p>
<p>UseDNS no<br />
Protocol 2<br />
PermitRootLogin no</p></blockquote>
<blockquote><p><strong>YUM</strong></p>
<p>yum -y update<br />
rpm –import <a href="http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt">http://dag.wieers.com/rpm/packages/RPM-GPG-KEY.dag.txt</a><br />
rpm -Uvh <a href="http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.i386.rpm">http://packages.sw.be/rpmforge-release/rpmforge-release-0.5.1-1.el5.rf.i386.rpm</a><br />
yum install fetchmail wget bzip2 unzip zip nmap openssl lynx fileutils ncftp gcc gcc-c++ system* quota bind-chroot mysql mysql-devel mysql-server cyrus-sasl cyrus-sasl-devel cyrus-sasl-gssapi cyrus-sasl-md5 cyrus-sasl-plain postfix dovecot php php-devel php-gd php-imap php-ldap php-mysql php-odbc php-pear php-xml php-xmlrpc curl curl-devel perl-libwww-perl ImageMagick libxml2 libxml2-devel webalizer ntp perl-HTML-Parser perl-DBI perl-Net-DNS perl-Digest-SHA1 rpm* postgrey kernel-headers kernel-devel smbldap* alpine</p></blockquote>
<blockquote><p>updatedb<br />
makewhatis</p></blockquote>
<blockquote><p><strong>INITTAB</strong><br />
<em>/etc/inittab</em></p>
<p>modificare il parametro da: &#8220;id:<strong>5</strong>:initdefault:&#8221;<br />
a: &#8220;id:<strong>3</strong>:initdefault:&#8221;</p></blockquote>
<blockquote><p><strong>File HOSTS</strong><br />
<em>/etc/hosts</em></p>
<p>Modificare il file da &#8230;<br />
127.0.0.1 pdc.server.it pdc localhost.localdomain localhost<br />
::1 localhost6.localdomain6 localhost6</p>
<p>a &#8230;<br />
127.0.0.1 localhost.localdomain localhost<br />
(INDIRIZZO_IP_SERVER) pdc.server.it pdc</p></blockquote>
<blockquote><p>/etc/sysctl.conf</p>
<p>Aggiungere al file:</p>
<p># Enable TCP SYN Cookie Protection<br />
net.ipv4.tcp_syncookies = 1<br />
# Disable ICMP Redirect Acceptance<br />
net.ipv4.conf.all.accept_redirects = 0<br />
# Enable IP spoofing protection, turn on source route verification<br />
net.ipv4.conf.all.rp_filter = 1<br />
# Enable ignoring broadcasts request<br />
net.ipv4.icmp_echo_ignore_broadcasts = 1<br />
# Enable bad error message Protection<br />
net.ipv4.icmp_ignore_bogus_error_responses = 1<br />
# Log Spoofed Packets, Source Routed Packets, Redirect Packets<br />
net.ipv4.conf.all.log_martians = 1<br />
# increase TCP max buffer size setable using setsockopt()<br />
net.core.rmem_max = 40500000<br />
net.core.wmem_max = 40500000<br />
# increase Linux autotuning TCP buffer limits<br />
# min, default, and max number of bytes to use<br />
# set max to at least 4MB, or higher if you use very high BDP paths<br />
net.ipv4.tcp_rmem = 4096 87380 40500000<br />
net.ipv4.tcp_wmem = 4096 65536 40500000<br />
# don&#8217;t cache ssthresh from previous connection<br />
net.ipv4.tcp_no_metrics_save = 1<br />
net.ipv4.tcp_moderate_rcvbuf = 1<br />
# recommended to increase this for 1000 BT or higher<br />
net.core.netdev_max_backlog = 2500<br />
# for 10 GigE, use this<br />
# net.core.netdev_max_backlog = 30000</p>
<p>net.ipv4.conf.all.send_redirects = 0<br />
net.ipv4.conf.default.send_redirects = 0<br />
net.ipv4.tcp_max_syn_backlog = 1280<br />
net.ipv4.conf.all.accept_source_route = 0<br />
net.ipv4.conf.all.secure_redirects = 0<br />
net.ipv4.conf.default.accept_redirects = 0<br />
net.ipv4.conf.default.secure_redirects = 0<br />
net.ipv4.tcp_timestamps = 0</p></blockquote>
<blockquote><p>yum install chkrootkit rkhunter</p>
<p>rkhunter &#8211;update<br />
rkhunter -c<br />
chkrootkit</p></blockquote>
<blockquote><p><strong>AGGIORNAMENTI AUTOMATICI DI SISTEMA</strong></p>
<p><em>Digitare: crontab -e ed inserire</em><br />
07 00 * * * /usr/bin/yum -y update</p>
<p><em>Nel caso di aggiornamento di macchina virtuale con installati i VMware Tools &#8230;</em><br />
07 00 * * * /usr/bin/yum -y update &#8211;exclude=*kernel*</p></blockquote>
<blockquote><p>
<strong>Stoppare i servizi &#8220;inutili&#8221;</strong><br />
chkconfig anacron off<br />
chkconfig atd off<br />
chkconfig auditd off<br />
chkconfig cpuspeed off<br />
chkconfig kudzu off<br />
chkconfig netfs off<br />
chkconfig ip6tables off<br />
chkconfig smartd off<br />
chkconfig pcscd off<br />
chkconfig cups off<br />
chkconfig mcstrans off<br />
chkconfig nfslock off<br />
chkconfig rpcgssd off<br />
chkconfig rpcidmapd off<br />
chkconfig portmap off<br />
chkconfig nfs off
</p></blockquote>
<blockquote><p>
<strong>Gestione del firewall &#8230;</strong><br />
wget ftp://ftp.pbone.net/mirror/ftp.falsehope.net/home/tengel/centos/4/te/i386/RPMS/portsentry-1.2-1.te.i386.rpm<br />
rpm -Uvh portsentry-1.2-1.te.i386.rpm<br />
chkconfig portsentry on</p>
<p>vi /etc/portsentry/portsentry.conf<br />
# Default TCP ident and NetBIOS service<br />
ADVANCED_EXCLUDE_TCP=&#8221;21,22,25,53,80,110,113,135,137,138,139,<strong>443</strong>,445&#8243;<br />
# Default UDP route (RIP), NetBIOS, bootp broadcasts.<br />
ADVANCED_EXCLUDE_UDP=&#8221;520,517,518,513,138,137,123,68,67,53&#8243;</p>
<p>scommentare:<br />
<strong>#</strong>KILL_RUN_CMD=&#8221;/bin/mail -s &#8216;Portscan from $TARGET$ on port $PORT$&#8217; user@host &lt; /dev/null&quot;
</p></blockquote>
<blockquote><p>
Skel<br />
Quando viene creata la home directory di un nuovo utente, viene inizializzata con i file dalla directory /etc/skel.<br />
L&#8217;amministratore di sistema può creare dei file in /etc/skel  che daranno un ambiente di default per gli utenti.<br />
Ad esempio può creare un file /etc/skel/.profile che imposta la variabile d&#8217;ambiente EDITOR ad un editor facile da usare.</p>
<p>Comunque di solito è meglio provare a tenere /etc/skel il più piccolo possibile, perché sarebbe poi quasi impossibile aggiornare i file degli utenti esistenti. Ad esempio, se cambia il nome dell&#8217;editor, tutti gli utenti esistenti dovrebbero modificare il proprio .profile . L&#8217;amministratore di sistema può provare a farlo automaticamente, con uno script, ma è quasi certo che danneggerebbe il file di qualcuno.</p>
<p>Quando possibile è meglio mettere le configurazioni globali nei file globali, come /etc/profile . In questo modo è possibile aggiornarlo senza rovinare i setup personali degli utenti. </p>
<p>cd /etc/skel<br />
mkdir -p /etc/skel/Maildir/new<br />
mkdir -p /etc/skel/Maildir/cur<br />
mkdir -p /etc/skel/Maildir/tmp
</p></blockquote>
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		<slash:comments>1</slash:comments>
	
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			<media:title type="html">BoB</media:title>
		</media:content>
	</item>
		<item>
		<title>Sincronizzare l&#8217;orologio di sistema</title>
		<link>http://opuntia.biz/2009/12/26/sincronizzare-lorologio-di-sistema/</link>
		<comments>http://opuntia.biz/2009/12/26/sincronizzare-lorologio-di-sistema/#comments</comments>
		<pubDate>Sat, 26 Dec 2009 13:19:21 +0000</pubDate>
		<dc:creator>Calogero Bonasia</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[data]]></category>
		<category><![CDATA[linux]]></category>
		<category><![CDATA[ora]]></category>
		<category><![CDATA[orario]]></category>
		<category><![CDATA[orologio]]></category>
		<category><![CDATA[sistema]]></category>
		<category><![CDATA[time]]></category>

		<guid isPermaLink="false">http://opuntia.biz/?p=193</guid>
		<description><![CDATA[In risposta a chi telefona per sapere come aggiustare la data del server<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=193&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Il Network Time Protocol, in sigla NTP, è un protocollo per sincronizzare gli orologi dei computer all&#8217;interno di una rete a commutazione di pacchetto, quindi con tempi di latenza variabili ed inaffidabili.</p>
<p>L&#8217;NTP è un protocollo client-server appartenente al livello applicativo. Per sincronizzare manualmente l&#8217;orologio di sistema con quello di un server, da console, in modalità root, si dia il comando</p>
<p><code>ntpdate ntp1.ien.it</code></p>
<p>oppure</p>
<p><code>ntpdate ntp.ubuntu.com pool.ntp.org</code></p>
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			<media:title type="html">Calogero Bonasia</media:title>
		</media:content>
	</item>
		<item>
		<title>Bloccare i macaddress con iptables</title>
		<link>http://opuntia.biz/2009/09/17/bloccare-i-macaddress-con-iptables/</link>
		<comments>http://opuntia.biz/2009/09/17/bloccare-i-macaddress-con-iptables/#comments</comments>
		<pubDate>Thu, 17 Sep 2009 08:27:45 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[Linux tips]]></category>

		<guid isPermaLink="false">http://opuntia.biz/?p=150</guid>
		<description><![CDATA[In /etc/sysconfig/iptables -A INPUT -i (interfaccia) -m mac (mac address) -j ACCEPT/DROP Esempio: -A INPUT -i eth1 -m mac &#8211;mac 00:04:76:22:DC:AA -j <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=150&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>In /etc/sysconfig/iptables<br />
-A INPUT -i (interfaccia) -m mac (mac address) -j ACCEPT/DROP</p>
<p>Esempio:<br />
-A INPUT -i eth1 -m mac &#8211;mac 00:04:76:22:DC:AA -j ACCEPT</p>
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			<media:title type="html">BoB</media:title>
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	</item>
		<item>
		<title>Pine e Maildir</title>
		<link>http://opuntia.biz/2009/07/24/pine-e-maildir/</link>
		<comments>http://opuntia.biz/2009/07/24/pine-e-maildir/#comments</comments>
		<pubDate>Fri, 24 Jul 2009 11:36:06 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[Linux tips]]></category>
		<category><![CDATA[Posta elettronica]]></category>

		<guid isPermaLink="false">http://rpennol.wordpress.com/?p=123</guid>
		<description><![CDATA[Pine è un programma testuale sotto Linux che permette di leggere la posta elettronica e i newsgroup. E&#8217; possibile configurare Pine in modo tale da leggere le mail anche se il server utilizza il formato Maildir. Basta editare il file /etc/pine.conf (in modo tale da cambiare la configurazione a livello di sistema) e modificare il <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=123&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Pine è un programma testuale sotto Linux che permette di leggere la posta elettronica e i newsgroup.<br />
E&#8217; possibile configurare Pine in modo tale da leggere le mail anche se il server utilizza il formato Maildir.<br />
Basta editare il file /etc/pine.conf (in modo tale da cambiare la configurazione a livello di sistema) e modificare il parametro &#8220;inbox-path&#8221; in</p>
<p>inbox-path=&#8221;~/Maildir/&#8221;</p>
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			<media:title type="html">BoB</media:title>
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		<item>
		<title>Cosa conviene mettere in /etc/skel (work in progress &#8230;)</title>
		<link>http://opuntia.biz/2009/07/24/cosa-conviene-mettere-in-etcskel-work-in-progress/</link>
		<comments>http://opuntia.biz/2009/07/24/cosa-conviene-mettere-in-etcskel-work-in-progress/#comments</comments>
		<pubDate>Fri, 24 Jul 2009 10:50:49 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[Linux tips]]></category>
		<category><![CDATA[Posta elettronica]]></category>
		<category><![CDATA[Postfix]]></category>

		<guid isPermaLink="false">http://rpennol.wordpress.com/?p=121</guid>
		<description><![CDATA[In alcune distribuzioni Linux quando si crea un utente viene creato (oltre l&#8217;utente in /etc/passwd) anche il gruppo e la home directory sotto /home/nome_utente Tramite Skel (/etc/skel/) è possibile aggiungere contenuti &#8220;extra&#8221;. In pratica è possibile decidere cosa mettere di default nella home dell&#8217;utente. In questo piccolo articolo vengono inseriti dei tweak che è preferibile <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=121&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>In alcune distribuzioni Linux quando si crea un utente viene creato (oltre l&#8217;utente in /etc/passwd) anche il gruppo e la home directory sotto /home/nome_utente<br />
Tramite Skel (/etc/skel/) è possibile aggiungere contenuti &#8220;extra&#8221;. In pratica è possibile decidere cosa mettere di default nella home dell&#8217;utente.<br />
In questo piccolo articolo vengono inseriti dei tweak che è preferibile predefinire su un server:</p>
<p># Aggiungere le directory connesse a MailDir sotto le home degli utenti neo-creati<br />
mkdir -p /etc/skel/Maildir/new<br />
mkdir -p /etc/skel/Maildir/cur<br />
mkdir -p /etc/skel/Maildir/tmp</p>
<p>&#8230;<br />
&#8230;<br />
..</p>
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			<media:title type="html">BoB</media:title>
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		<item>
		<title>Creazione di un certificato per connessioni HTTPS</title>
		<link>http://opuntia.biz/2009/07/08/creazione-di-un-certificato-per-connessioni-https/</link>
		<comments>http://opuntia.biz/2009/07/08/creazione-di-un-certificato-per-connessioni-https/#comments</comments>
		<pubDate>Wed, 08 Jul 2009 09:21:06 +0000</pubDate>
		<dc:creator>BoB</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[Linux tips]]></category>

		<guid isPermaLink="false">http://rpennol.wordpress.com/?p=112</guid>
		<description><![CDATA[Creazione chiave privata e certificato standard openssl genrsa -des3 -out /etc/pki/CA/CA.key 2048 Creazione del certificato &#8211; durata 5 anni/1825 giorni mkdir -p /etc/httpd/conf/ssl.crt mkdir -p /etc/httpd/conf/ssl.key openssl req -new -x509 -days 1825 -key /etc/pki/CA/CA.key -out /etc/httpd/conf/ssl.crt/CA.crt Proteggiamo i certificati e generiamo la struttura che userà OpenSSL quando andremo a firmare il nostro dominio chmod 600 <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=112&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><strong>Creazione chiave privata e certificato standard</strong><br />
openssl genrsa -des3 -out /etc/pki/CA/CA.key 2048</p>
<p><strong>Creazione del certificato &#8211; durata 5 anni/1825 giorni</strong><br />
mkdir -p /etc/httpd/conf/ssl.crt<br />
mkdir -p /etc/httpd/conf/ssl.key<br />
openssl req -new -x509 -days 1825 -key /etc/pki/CA/CA.key -out /etc/httpd/conf/ssl.crt/CA.crt</p>
<p><strong>Proteggiamo i certificati e generiamo la struttura che userà OpenSSL quando andremo a firmare il nostro dominio</strong></p>
<p>chmod 600 /etc/httpd/conf/ssl.crt/CA.crt<br />
mkdir -p /etc/pki/tls/newcerts<br />
cp /etc/httpd/conf/ssl.crt/CA.crt /etc/pki/tls/cacert.pem<br />
cp /etc/pki/CA/CA.key /etc/pki/tls/private/cakey.pem<br />
cp /etc/pki/CA/CA.key /etc/pki/CA/private/cakey.pem<br />
echo 01 &gt; /etc/pki/tls/serial<br />
touch /etc/pki/tls/index.txt</p>
<p><strong>Creazione della chiave privata del server</strong><br />
openssl genrsa -des3 -out /etc/pki/tls/miodominio.it.key 2048</p>
<p><strong>Richiesta di certificato</strong><br />
openssl req -new -key my-server.key -out my-server.csr</p>
<p><strong>Fare finta di essere una CA</strong><br />
cd /etc/pki/tls/<br />
openssl ca -in /etc/pki/tls/miodominio.it.csr -out /etc/pki/tls/miodominio.it.crt &#8211;days 1825</p>
<p><strong>Copiamo i certificati in Apache</strong><br />
cp /etc/pki/tls/miodominio.it.crt /etc/httpd/conf/ssl.crt/miodominio.it.crt<br />
chmod 600 /etc/httpd/conf/ssl.crt/miodominio.it.crt<br />
cp /etc/pki/tls/miodominio.it.key /etc/httpd/conf/ssl.key/miodominio.it.key<br />
chmod 600 /etc/httpd/conf/ssl.key/miodominio.it.key</p>
<p><strong>Editare il file ssl.conf </strong><br />
vi /etc/httpd/conf.d/ssl.conf<br />
e modificare:<br />
SSLCertificateFile /etc/httpd/conf/ssl.crt/miodominio.it.crt<br />
SSLCertificateKeyFile /etc/httpd/conf/ssl.key/miodominio.it.key<br />
Per eliminare la passphrase all&#8217;avvio di Apache:<br />
openssl rsa -in /etc/pki/tls/miodominio.it.key -out /etc/pki/tls/miodominio.it.key.nopass<br />
cp /etc/pki/tls/miodominio.it.key.nopass /etc/httpd/conf/ssl.key/miodominio.it.key</p>
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		<title>Formattare l&#8217;hard disk da riga di comando</title>
		<link>http://opuntia.biz/2009/07/07/formattare-lhard-disk-da-riga-di-comando/</link>
		<comments>http://opuntia.biz/2009/07/07/formattare-lhard-disk-da-riga-di-comando/#comments</comments>
		<pubDate>Tue, 07 Jul 2009 12:40:22 +0000</pubDate>
		<dc:creator>Calogero Bonasia</dc:creator>
				<category><![CDATA[A-shell-power]]></category>
		<category><![CDATA[Linux tips]]></category>

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		<description><![CDATA[Formattare l&#8217;hard disk da riga di comando Domanda: &#8220;vorrei formattare il mio hard disk cancellando Windows per installare Linux. Come posso farlo da riga di comando ?&#8221; Procurati una versione live di Linux Ubuntu e falla partire sul tuo povero computer (che fino ad oggi ha dovuto sguazzare nella palude di catrame&#8230;). Apri una finestra <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=opuntia.biz&#038;blog=8227010&#038;post=69&#038;subd=rpennol&#038;ref=&#038;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Formattare l&#8217;hard disk da riga di comando<br />
Domanda: &#8220;vorrei formattare il mio hard disk cancellando Windows per installare Linux. Come posso farlo da riga di comando ?&#8221;</p>
<p>Procurati una versione live di Linux Ubuntu e falla partire sul tuo povero computer (che fino ad oggi ha dovuto sguazzare nella palude di catrame&#8230;).</p>
<p>Apri una finestra terminale e scrivi</p>
<p>fdisk</p>
<p>Ipotizziamo che il tuo hard disk sia riconosciuto come /dev/hda, dovrai lanciare il comando (come super utente)</p>
<p>sudo fdisk /dev/hda</p>
<p>e successivamente premere &#8220;m&#8221;, in questo modo per avere l&#8217;elenco completo dei comandi disponibili.</p>
<p>* a Cambia bootable flag<br />
* b modifica di bsd disklabel<br />
* c cambia il flag compatibile con il dos<br />
* d cancellazione di una partizione<br />
* l elenco dei tipi di partizione conosciuti<br />
* m stampa di questo menu<br />
* n aggiunta di una nuova partizione<br />
* o creazione di una nuova tabella delle partizioni DOS vuota<br />
* p stampa della tabella delle partizioni<br />
* q uscita senza salvataggio delle modifiche<br />
* s creazione di una nuova disklabel Sun vuota<br />
* t modifica dell&#8217;id di sistema di una partizione<br />
* u modifica delle unitÃ di visualizzazione/di immissione<br />
* v verifica della tabella delle partizioni<br />
* w scrittura della tabella su disco e uscita<br />
* x ulteriori funzioni (solo per esperti)</p>
<p>Quindi premendo &#8220;p&#8221; ti verra mostrata la tabella delle partizioni, per esempio potresti vedere qualcosa del genere</p>
<p>Disk /dev/hda: 40.0 GB, 40027029504 bytes<br />
255 heads, 63 sectors/track, 4866 cylinders<br />
Units = cilindri of 16065 * 512 = 8225280 bytes</p>
<p>Usando il &#8220;d&#8221; cancellerai le varie partizioni esistenti.</p>
<p>Una valida alternativa è cfdisk, in ogni caso suggerisco di fare<br />
massima attenzione quando si adoperano questi programmi, soprattutto se si è alle prime armi. </p>
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