deletes first 55 lines; change the 55 to whatever number
changes the PS1 to something better than default. [username.hostname.last-2-digits-of-ip] (current directory) Show Sample Output
gpg command to encrypt a file on the command line.
gpg command to decrypt a previously encrypted file on the command line. Can be optionally made into an alias: alias decrypt='gpg --output foo.txt --decrypt foo.txt.pgp'
For quick validation of folder's file-contents (structure not taken into account) - I use it mostly to check if two folders' contents are the same. Show Sample Output
-p PID and name of the program -u on a UDP port. -t also TCP ports -o networking timer -n numeric IP addresses (don't resolve them) -a all sockets
This command converts a MySQL query directly into a .csv (Comma Seperated Value)-file. Show Sample Output
You can read, add, delete and modify Windows permissions from Linux using smbcacls from the smb-client package. Show Sample Output
Very useful set of commands to know when your file system was created. Show Sample Output
Sometimes, you have a lot of NFS in the server and you can't or shouldn't use umount -a. Whis this command, you only umount the fs related to the 'string'
Replace sed regular expressions with perl patterns on the command line. The sed equivalent is: echo "sed -e"|sed -e 's/sed -e/perl -pe/' Show Sample Output
In addition to a swap partition, Linux can also use a swap file. Some programs, like g++, can use huge amounts of virtual memory, requiring the temporary creation of extra space.
While at the command line of of hosta, scp a file from remote hostb to remote hostc. This saves the step of logging into hostb and then issuing the scp command to hostc.
Simply pass an argument to the script to convert the manual page to a PDF:
man2pdf drutil
This let you know which modules has loaded the Apache server, very useful to know if the mod_rewrite is ready to use. Show Sample Output
Note the extra space before the command (I had to put it as an underscore since the website eats up preceding spaces). That's all it takes. Now if you check your history with "$ history", it wont show up.
Great for finding which jar some pesky class is hiding in! Show Sample Output
For a python project, sometimes I need to clean all the compiled python files. I have an alias 'rmpyc' to this command. This really saves me a lot of typing and hunting throughout the folders to delete those files.
So you have a web site and you've plastered your significant other's name all over it. But you broke up with them and have some new love in your life. How do you find all those instances of their name and replace them?
If are a Bash user and you are in a directory and need to go else where for a while but don't want to lose where you were, use pushd instead of cd. cd /home/complicated/path/.I/dont/want/to/forget pushd /tmp cd thing/in/tmp popd (returns you to /home/complicated/path/.I/dont/want/to/forget)
Backups all MySQL databases to individual files. Can be put into a script that grabs current date so you have per day backups.
This gets you your default route programatically, useful for scripts
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