Commands by siya02 (0)

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generate a telephone keypad
Draw a telephone keyboard, using just a shell built-in command.

Query well known ports list
Uses the file located in /etc/services

recurisvely md5 all files in a tree
Found this little gem here: http://info.michael-simons.eu/2008/10/25/recursively-md5sum-all-files-in-a-directory-tree/

Search for a string inside all files in the current directory
options: -n line nbrs, -i ignore case, -s no "doesn't exist", -I ignore binary args: * for all files of current dir (not hidden), .[!.]* for all hidden files I don't include by default the -R (recursive) option, which is not always useful. You add it by hand when needed.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Make .bashrc function to backup the data you changed last houres
The original overwrites any previous backups, and only saves exactly the last hours worth, but not 1 hour + 1 minute. This version creates or appends files, and backs up everything since the last backup (using the backups timestamp as the reference), plus it uses TMPDIR if set.

Empty a file

pretend to be busy in office to enjoy a cup of coffee
Not as taxing on the CPU.

list files recursively by size

Instant mirror from your laptop + webcam
Flips the y-axis to emulate a real mirror, uses low resolution for speed, this will also hide blemishes and the like :)

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