Archive for the ‘ A-shell-power ’ Category

Access to specific man page section

You can view the man pages from section five by passing the section number as an argument to the man command man 5 cat[ CONTINUA A LEGGERE ]

How to extract text from PDF files

pdftotext [options] [PDF-file [text-file]] Switches -f number specifies the first page to convert -l number specifies the last page to convert -layout maintain (as best as possible) the original physical layout of the text. The default is to “undo” physical layout (columns, hyphenation, etc.) and output the text in reading order -raw keep the text [ CONTINUA A LEGGERE ]

Add another tty device using mknod command

When you need to add another tty device that can automatically start at boot time sudo mknod /dev/ttyS4 c 4 [ CONTINUA A LEGGERE ]

Process accounting

acct ( http://www.gnu.org/software/acct/ ) è un programma che permette di conteggiare il tempo di “logon” degli utenti. Molto utile agli amministratori di sistema. Su Ubuntu si installa impartendo sudo apt-get install acct Successivamente occorre creare un apposito file di log sudo touch /var/log/utentecosastaifacendo_acct e lanciare il programma sudo accton /var/log/utentecosastaifacendo_acct è ammessa anche la sintassi [ CONTINUA A LEGGERE ]

How to copy CD/DVD into hard disk (.iso)

A dear friend of mine asked me how do I copy a DVD to your hard drive? If you want to make a copy of the ISO image that was burned to a CD or DVD, insert that medium into your CD/DVD drive and (assuming /dev/cdrom is associated with your computer?s CD drive) type the [ CONTINUA A LEGGERE ]

How to know the total number of packages available

How to know the total number of packages available apt-cache stats[ CONTINUA A LEGGERE ]

Check the apt security keys

For example: check the APT security keys to make sure the Google digital signature was imported correctly apt-key list[ CONTINUA A LEGGERE ]

Barbatrucco con “cd”

Ipotizziamo che per lavoro sia necessario spostarsi frequentemente tra due directory del server. A me capita con le installazioni di Zope. Ci viene in aiuto il comando cd - ecco come usarlo. Dapprima si “accede” alla directory uno, ad esempio scriviamo cd /opt/Zope/instance/bin e successivamente scriviamo cd /opt/Zope/instance/etc se adesso impartiamo il comando cd - [ CONTINUA A LEGGERE ]

Start a terminal with three open tabs

If you launch gnome-terminal manually, you can start with three open tabs gnome-terminal --tab --tab --tab[ CONTINUA A LEGGERE ]

How to secure delete a file

Instead, install apt-get install secure-delete and you can use: srm to delete file and directory on hard disk smem to delete file in RAM sfill to delete “free space” on hard disk sswap to delete all data from swap shred -u -z -n 17 rubricasegreta.txt[ CONTINUA A LEGGERE ]

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