Show today date on a yearly calendar.

simple way to show free swap

free swap

see about php install configure

I find this format easier to read if your going through lots of files. This way you can open the file in any editor and easily review the file

Traces the system calls of a program. See http://linuxhelp.blogspot.com/2006/05/strace-very-powerful-troubleshooting.html for more information.

This command will print all fields from the given input to the end of each line, starting with the Nth field.

This has helped me numerous times trying to find either log files or tmp files that get created after execution of a command. And really eye opening as to how active a given process really is. Play around with -anewer, -cnewer & -newerXY

xargs can be used in this manner to download multiple files at a time, and xargs will in this case run 10 processes at a time and initiate a new one when the number running falls below 10.

dsh - Distributed shell, or dancer?s shell ;-)

you can put your servers into /etc/dsh/machines.list than you don't have to serperate them by commata or group them in different files and only run commands for this groups

dsh -M -c -a -- "apt-get update"

or: C

Same as:

1 rpm -ivh package.rpm

2 yum localinstall package.rpm

3 Edit /etc/yum.conf or repository.repo and change the value of gpgcheck from 1 to 0 (!dangerous)

Instead of using:

0,15,30,45 * * * * /path/to/command

for mousevents, move the mouse over the window and click/move etc.

usefull for getting mouseKeys, or keyKeys. also usefull for checking if X gets those mouse-events.

If the site uses https, use:

to convert a whole directory, put all mp3 files in a for loop

rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. rkhunter is a shell script which carries out various checks on the local system to try and detect known rootkits and malware. It also performs checks to see if commands have been modified, if the system startup files have been modified, and various checks on the network interfaces, including checks for listening applications.