due to bug can not comment

add |sh when you agree the list, I often use that method to prevent typos in dangerous or long operations

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

Use this command to see logs update in real time

Telnet will make a tcp connection to a remote ip/port to test connectivity. If it times out, it's not reaching the host (maybe the firewall is blocking it). If connection is refused, it's reaching the host, but either the service is not listening on that port, or it's locked. Show Sample Output

Taken from: http://www.webmasterworld.com/forum40/1310.htm

taken from http://blog.ofirpicazo.com/linux/batch-convert-files-to-utf-8/

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U have to make key exchange in order to avoid continuous password prompt. Show Sample Output

sh as: #! /bin/sh while [ 1 -ne 6 ]; do pid=`ps -ef | grep -v "grep" | grep "trans_gzdy" | cut -c10-17` ps gv $pid | head -2 sleep 1 done check changes of RSS. Show Sample Output

arguably better than using the driver interface. lots of potentially cool stuff to be done w/ the dcop client.

Handy for those times you need to paste a file path in an IDE or some other app. sudo apt-get install xclip Then, for convenience, alias xclip to 'xclip -selection c' so you can just do something like realpath . | xclip

If you want to display a dialog (using xdialog/kdialog/zenity) you need to make sure that you have a valid X session. Checks for the existence of the DISPLAY variable.

nmap accepts a wide variety of addressing notation, multiple targets/ranges, etc.

e.g. if rm is aliased for 'rm -i', you can escape the alias by prepending a backslash: rm [file] # WILL prompt for confirmation per the alias \rm [file] # will NOT prompt for confirmation per the default behavior of the command

Change the -p argument for the port number. See "man nmap" for different ways to specify address ranges. Show Sample Output

Just run the command, type your password, and that's the last time you need to enter your password for that server. This assumes that the server supports publickey authentication. Also, the permissions on your home dir are 755, and the permissions on your .ssh dir are 700 (local and remote).

If you come from a DOS background and accidentally use DOS commands often, this and others like it can be helpful. Add to your .bash_profile, or wherever you keep such things.

Insert the last argument to the previous command

this is very useful when there is a different network host to determine which are turned on or not Show Sample Output

You'll need to make sure your xorg.conf permits a virtual screen size this big. If it doesn't then xrandr should return a suitable error message that tells you the required size.