Commands by Dereckson (1)

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Calculate days on which Friday the 13th occurs
I removed the dependency of the English language

Fake system time before running a command
Fake system time before running any command.

ssh autocomplete
Add to your bash profile to minimize carpal tunnel syndrome. Doesn't work with [email protected] but appending "-l user" works fine if needed. Works for ping as well.. complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ping

Find default gateway (proper at ppp connections too)

Mount a disk image (dmg) file in Mac OSX
To unmount, replace "attach" with "eject"

Press a key automatically
Press a key automatically via xvkbd.

Colorful man
That command installs "most" and make this command as the default man reader. The "most" works like "less" (the current man reader), but it render colors for manpages and may do more things. Read "man most". You can see a preview here: http://www.dicas-l.com.br/dicas-l/20090718.php

Calculate pi to an arbitrary number of decimal places
Change the scale to adjust number of decimal places prefix the command with "time" to benchmark the computer (compare how long it takes to calculate 10000 digits of pi on various computers).

See KeepAlive counters on tcp connections
See connection's tcp timers

determine if tcp port is open
for udp nmap -sU -p 80 hostname


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