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

backup your history
simple and easy backup your history with timestamp

this toggles mute on the Master channel of an alsa soundcard

combining streams
2>&1 permit to combinate stdout and stderr. grep will catch stderr and stdout instead of stdout only.

Check host port access using only Bash:

Console clock
Shows a simple clock in the console -t param removes the watch header Ctrl-c to exit

Bypass 1000 Entry limit of Active Directory with ldapsearch
That command bypass the entry limit specifing page results size, when the search arrive to the limit ldapsearch magically reiterate it from the last entry.

Set laptop display brightness
Run as root. Path may vary depending on laptop model and video card (this was tested on an Acer laptop with ATI HD3200 video). $ cat /proc/acpi/video/VGA/LCD/brightness to discover the possible values for your display.

Quickly find a count of how many times invalid users have attempted to access your system

Remove color codes (special characters) with sed


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