Month: July 2011

restarting/stopping/starting a service On any init.d based linux distro you can restart a service with the following… /etc/init.d/serviceName restart You may replace ‘restart’ with ’stop’ or ’start’ (and in some cases ’status’). Forcefully stopping a service killall processName Killing on instance of a service kill pid The pid can be gathered by either top or… Continue reading Service/Daemon Management

useradd useradd userName then run “passwd userName” to set the new users pw passwd passwd username will ask for the new pw twice

Listing Permissions ls -al will display all files in a list with their owners and permissions -rw-r–r– 1 irq13 irq13 1006 Jan 24 10:16 .bashrc Now to break down the above example… -rw-r–r– is the permissions area. The first – would be d if the item is directory, otherwise it will be -. The second… Continue reading File Permissions

ps | grep ssh — only display lines that contain ssh ; used to “stack commands” or issue multiple commands on 1 line. cd ..; ls & puts a command in the background. Will let you know when the command is finished > write what is displayed on the screen from a given command to… Continue reading Additional command operators

* whoami : displays current user * top : displays the top cpu/memory eaters and system load.. like task manager on windows * ps : displays all processes running.. ps aux is the most useful way to run it * wall “some text” : sends a broadcast message to all logged on users * man… Continue reading Basic commands

/ : root of the file system contains all devices and directory’s /root : the root users home directory /home : all other users home dirs reside in here /boot : All the kernels and boot specific info /tmp : temporary files are stored here, is commonly world writable so keep an eye on it… Continue reading File System

I see most of the people searching for basics on linux and found much difficult to get it in short. I have gathered some from a wiki and will add to this section. This might help some of you guys 🙂