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May 21
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ls – Display the contents of the current directory.
pwd – Display Present working directory.
cd .. – Change directories.
cd - Enter into that directory.
mv – Change the name of a directory.
cp – Copy files and directories.
startx – Start the GUI.
halt – To shut down the system.
kill/killall – Stop a process from running. The difference between the two commands is that kill requires the PID (process ID number) and killall requires only the executable name.
logout – To quit using the system.
mkdir – Make directories Create the Directory(ies), if they do not already exist.
top – Displays the taks that are currently running.
who – Show who is logged on.
man – To help you understand how to use a command.
mount/umount -Mount a file system.
cal – Displays a calendar.
clear – Clears the terminal screen.
su/su- – Allows one user to temporarily become another user/ – Switching to root path.
vi and nano – These are some most widely used editors in linux.
ps – Used to find process status.
ifconfig – Configure a network interface and also to find the ip of machine.
cat – Concatenate one or more files.
find – Used to search files in a directory .
free – Display statistics about memory usage.
df-h – To find the amount of hard disk space and what’s free .