1 bash programming intro http://www.faqs.org/docs/Linux-HOWTO/Bash-Prog-Intro-HOWTO.html 1 ssh\\ to ssh into another box with a non-standard port {code} ssh <server> -p <port> {code} 1 Zip\\ to zip all of a directory in linux {code} zip -r <file_name>.zip <dir_to_zip> {code} 1 Tar\\ to tar the contents of a directory (creating the tar): {code} tar -cvf <file_name>.tar <dir_to_zip> {code} to add to an existing tar {code} tar -rvf <file_name>.tar <dir_to_zip> {code} to list the contents of a tar {code} tar -v --list --file=/ {code} to extract the file {code} tar -xvf {code} to zip the file {code} gzip <file_name>.tar {code} 1 Date/Time see [Linux/Commands/Date,Time,TimeZones] for full info. To set the date time (to Jan 13 2006, 9:51am) __Note AMERICAN DATE FORMAT__ {code} date -s "01/13/2006 09:51:00" {code} 1 Secure Copy: scp To copy a file from one box to another {code} scp -P 7272 <local file> user@host:<remote location> {code} 1 Who's using the system, from where etc {code} w - show who is logged on and what they are doing {code} {code} users - print the user names of users currently logged in to the current host {code} {code} last - show listing of last logged in users {code} 1 Links To delete a symbolic link: {code} rm link_name {code} ie. Delete it as a regular file (make sure there is not / after it (if the link is a directory). 1 Finding text The following command will find all css files containing "background.gif". Customise as required. {code} find . -name "*.css" -exec grep -H background.gif {} \";" {code} 1 Deleting files first to verify we're not deleting sensitive files. {code} find . -name .DS_Store {code} The following command will use find to delete all found files (.svn files) {code} find . -name \*.svn -exec rm -rf {} \; {code} Usually {code} rm -rf <fileOrDir> {code} will do on most *nix, but not on the Mac ;( 1 chkconfig For checking and setting the run levels on a box 1 Global profiles __Application Environment Setup Using /etc/profile.d/*_ When a user logs in, environment variables are set from various places. That includes /etc/profile (for all users). Then all the files in the /etc/profile.d directory. Then ~/.bash_profile, then ~/.bashrc. /etc/profile.d/ is a good place to put your application specific setups. For example, I always use SSH for CVS (cf. RSH). So I use: {code} echo "export CVS_RSH=ssh" >> /etc/profile.d/cvs.sh chmod +x /etc/profile.d/cvs.sh {code} 1 Port forwarding (eg. access mysql through ssh) Use the following command to allow connection from a local mysql client to connect to a remote mysql server on 3306 through ssh. (i.e. port 3306 is not open to outside world) {code} ssh -p 7272 -L 9906:localhost:3306 mpecher@marandcustomsolutions.com {code} then local client points to: port 9906, and ip 127.0.0.1 1 lstail This bit of bash will do an ls 100 times {code} for i in $(seq 1 100); do ls -alp; sleep 0.25; done {code} 2009-04-28 09:22:04.0 2005-12-12 11:36:32.0