Commands by manju712 (1)

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Get the time since epoch
Get the time since epoch. Useful when working with commands and logs which use this format.

Turn shell tracing and verbosity (set -xv) on/off with 1 command!
Running this command turns shell tracing and shell verbose debugging on or off. Not only does it do that, it also uses your terminals builtin method of setting colors to make debugging much easier. It looks at the current shell options contained in the $- special bash variable and that lets this function set the opposite of the current value. So from the shell you could do a: $ setx; echo "y" | ( cat -t ) | echo "d"; setx and it will turn on debbuggin. This is an amazingly useful function that is perfect to add system-wide by adding it to /etc/profile or /etc/bashrc.. You can run it from the shell, and you can also use it in your shell scripts like my .bash_profile - http://www.askapache.com/linux-unix/bash_profile-functions-advanced-shell.html

get useful statistics from tcpdump (sort by ip)
We can get useful statistics from tcpdump with this simple command. Thanks "Babak Farrokhi" to teaching me this ;)

SMTP Analysis
This works just as well for SMTP. You could run this on your mail server to watch e-mail senders and recipients: tcpdump -l -s0 -w - tcp dst port 25 | strings | grep -i 'MAIL FROM\|RCPT TO'

Clone current directory into /destination verbosely
Copy every file from current directory to destination preserving modification time.

Edit your command in vim ex mode by <ctrl-f>
If you are in ex mode in vim i.e. you've pressed ':'. You can edit the current command by pressing <ctrl-f>

Search for a string inside all files in the current directory
Searches all files,dirs (also hidden) recursively

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Update your journal
prerequisite: $ mkdir ~/journal

Google Spell Checker
http://immike.net/blog/2007/04/07/hacking-google-spell-checker-for-fun-and-profit/

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