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Common Linux Commands

Written By Psychic Zero on Tuesday, October 7, 2014 | 4:34 PM

Open-source Linux is a popular alternative to Microsoft Windows, and if you choose to use this low-cost or free operating system, you need to know some basic Linux commands to make your system smoothly. The most common Linux commands are shown in this table.


CommandDescription
cat [filename]Display file’s contents to the standard output device (usually your monitor).
cd /directorypathChange to directory.
chmod [options] mode filenameChange a file’s permissions.
chown [options] filenameChange who owns a file.
clearClear a command line screen/window for a fresh start.
cp [options] source destinationCopy files and directories.
date [options]Display or set the system date and time.
df [options]Display used and available disk space.
du [options]Show how much space each file takes up.
file [options] filenameDetermine what type of data is within a file.
find [pathname] [expression]Search for files matching a provided pattern.
grep [options] pattern [filesname]Search files or output for a particular pattern.
kill [options] pidStop a process. If the process refuses to stop, use kill -9 pid.
less [options] [filename]View the contents of a file one page at a time.
ln [options] source [destination]Create a shortcut.
locate filenameSearch a copy of your filesystem for the specified filename.
lpr [options]Send a print job.
ls [options]List directory contents.
man [command]Display the help information for the specified command.
mkdir [options] directoryCreate a new directory.
mv [options] source destinationRename or move file(s) or directories.
passwd [name [password]]Change the password or allow (for the system administrator) to change any password.
ps [options]Display a snapshot of the currently running processes.
pwdDisplay the pathname for the current directory.
rm [options] directoryRemove (delete) file(s) and/or directories.
rmdir [options] directoryDelete empty directories.
ssh [options] user@machineRemotely log in to another Linux machine, over the network. Leave an ssh session by typing exit.
su [options] [user [arguments]]Switch to another user account.
tail [options] [filename]Display the last n lines of a file (the default is 10).
tar [options] filenameStore and extract files from a tarfile (.tar) or tarball (.tar.gz or .tgz).
topDisplays the resources being used on your system. Press q to exit.
touch filenameCreate an empty file with the specified name.
who [options]Display who is logged on.

Source For Dummies.


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