Commands by gtirloni (1)

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Display the output of a command from the first line until the first instance of a regular expression.
If BREs can be used, this sed version will also get the job done.

Edit the Last Changed File

See size of partitions as human readable
See size of partitions as human readable and get extra informations about hdd and partitions

Replicate a directory structure dropping the files

Find duplicate UID in /etc/passwd
You can use only awk

Find the package that installed a command

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

Insert a colon between every two digits
I sometimes have large files of MAC addresses stored in a file, some databases need the information stored with the semicolon (makes for easier programming a device) others don't. I have a barcode to text file scanner which usually butchers MAC addresses so this was the fix> I initially did this in awk ;) awk '{for(i=10;i>=2;i-=2)$0=substr($0,1,i)":"substr($0,i+1);print}' mac_address_list

Show the PATH, one directory per line (part 2)
Here is another way to show the path, one directory per line. The command `tr` translates the colon into the new line, taking input from the $PATH variable

split large video file
i have a large video file, 500+ MB, so i cant upload it to flickr, so to reduce the size i split it into 2 files. the command shows the splitting for the first file, from 0-4 minutes. ss is start time and t is duration (how long you want the output file to be). credit goes to philc: http://ubuntuforums.org/showthread.php?t=480343 NOTE: when i made the second half of the video, i got a *lot* of lines like this: frame= 0 fps= 0 q=0.0 size= 0kB time=10000000000.00 bitrate= 0.0kbit just be patient, it is working =)


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