Commands by quentin (2)

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list block devices
Shows all block devices in a tree with descruptions of what they are.

Pulls email password out of Plesk database for given email address.
This simply pulls the password out of the database for the given mail name for ease of use in testing emails that you would not normally have access to.

rotate a one page pdf to 90 Degrees Clockwise
This can be taken from the pdftk docs http://www.pdflabs.com/docs/pdftk-man-page/ http://www.pdflabs.com/docs/pdftk-cli-examples/ , but the command examples are not simple.

multiline data block parse and CSV data extraction with perl
extract data in multiline blocks of data with perl pattern matching loop

100% rollback files to a specific revision

Generate random valid mac addresses
Python Alternative

backup all your commandlinefu.com favourites to a plaintext file
Usage: clfavs username password num_favourite_commands file_in_which_to_backup

Tar - Compress by excluding folders
If you give tar a list of filenames, it will not add the directories, so if you don't care about directory ownership or permissions, you can save some space. Tar will create directories as necessary when extracting. This command is limited by the maximum supported size of the argument list, so if you are trying to tar up the whole OS for instance, you may just get "Argument list too long".

In place line numbering
Add permanent line numbers to a file without creating a temp file. The rm command deletes file10 while the nl command works on the open file descriptor of file10 which it outputs into a new file again named file10. The new file10 will now be numbered in the same directory with the same file name and content as before, but it will in fact be a new file, using (ls -i) to show its inode number will prove this.

Count number of files in a directory

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