A chronological documentation test project, nothing serious, really!
Theory and quick reference There are 3 file descriptors, stdin, stdout and stderr (std=standard). Basically you can: redirect stdout to a file redirect stderr to a file redirect stdout to a stderr redirect stderr to a stdout redirect stderr and stdout to a file redirect stderr and stdout to stdout redirect stderr and stdout to […]
Everyone has done one of the following to make a quick backup of a file: $ cp filename filename-old $ cp filename-old filename These seem fairly straightforward, what could possibly make them more efficient? Let’s look at an example $ cp filename{,-old} $ cp filename{-old,} $ cp filename{-v1,-v2} Brace expansion can take place anywhere in […]
Suppose you’re setting up a test environment, and you want a server to be able to handle some improbably large number of IP addresses, like a /16 or even larger. You could just write a script to add them all one at a time, or you could use this little shortcut and add the entire […]
Av og til kopierer man bilder og da kan det hende bildefila får feil dato og tid for når bildet ble tatt. Kjør dette scriptet er for å rette dette igjen
find /data/folder -type f -ctime +60 -exec /bin/rm {} \;