Commands by polar (5)

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Inverted cowsay
It's quite fun to invert text using "flip.pl" (ref: http://ubuntuforums.org/showthread.php?t=2078323 ). Slightly more challenging is to flip a whole "cowsay". :-)

Getting a domain from url, ex: very nice to get url from squid access.log

print all except first collumn

Blacklist usb storage
Some times you may ban usb to protect thefting of your personal data. Blacklist the usb_storage module by adding blacklist usb_storage to /etc/modprobe.d/blacklist.conf. To load the module manually, $sudo modprobe usb_storage.

Serial console to a Vmware VM
Create a serial console with "socket (named pipe)" of "/tmp/socket", "from:server, to:virtual machine" in vmware player, etc.. gui. Run the above command after you have booted the guest OS (which should also be configured for serial console).

Execute a command on logout
Execute a command on shell logout,and run it until is finished,then shell is closed.

list with full path
List the full path of some files. You can add ".*" on the end if you want to display hidden files.

Unixtime
displays time in seconds since January 1, 1970 UTC

Ping all hosts on 192.168.1.0/24

Debug bash shell scripts.
Display commands and their arguments as they are executed. Useful for debugging shell scripts.


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