Command |
Describe |
Alias |
Define an alias for the specified command |
Bg |
Run of later mode recovery jobs |
Bind |
Bind a keyboard sequence to a ReadLine function or macro |
Break |
Exit For, while, select, until Loops |
Builtin |
Executes the specified shell built-in command |
Cd |
Switches the current directory to the specified directory |
Caller |
Returns the context of all active child function calls |
Command |
Executes the specified command instead of the usual shell lookup |
Compgen |
Generate a possible complement match for the specified word |
Complete |
Shows how the specified word is fully complement |
Continue |
Continue with the next iteration of the for, while, select, until Loops |
Declare |
Declaring a variable or variable type |
Dirs |
Displays a list of current storage directories |
Dirsown |
Removes the specified job from the job list for the process |
Echo |
Outputs the specified character to stdout |
Enable |
To start or disable built-in shell commands |
Eval |
Stitch the specified parameters into a single command, and then execute the command |
Exec |
Replace the shell process with the specified command |
Exit |
Force the Shell to exit with the specified status code |
Export |
Sets the specified variable to be available to the child shell process |
Fc |
Select a list of commands from the history record |
Fg |
Resume job running in front-end mode |
Getopts |
Parse the specified positional parameters |
Hash |
Find and remember the full path name of the specified command |
Help |
Show Help Files |
History |
Show command history |
Jobs |
List the active jobs |
Kill |
Sends a system signal to the specified process ID (PID) |
Let |
Calculates each parameter in a mathematical expression |
Local |
Creating a scoped variable in a function |
Logout |
Exit Shell Login |
popd |
Delete records from the directory stack |
Printf |
displaying text using a formatted string |
pushd |
Add a directory to the directory stack |
Pwd |
Displays the path name of the current working directory |
Read |
Reads a row of data from stdin and assigns it to a variable |
ReadOnly |
Reads a row of data from stdin and assigns it to a variable that cannot be modified |
Return |
Forces the function to exit with a value that may be called by the script to extract |
Set |
setting and displaying the values and shell properties of environment variables |
Shift |
Set parameter down one position in turn |
Shopt |
Turn on/off variable values that control the shell's optional behavior |
Suspend |
Suspends execution of the shell, knowing that a sigcont signal is received |
Test |
Returns exit status code 0 or 1 based on specified criteria |
Times |
Displays the cumulative user and system time |
Trap |
If a specified system signal is received, execute the specified command |
Type |
Displays the specified word if it will be interpreted as a command |
Ulimit |
Sets an upper limit for the specified resource for the system user |
Umask |
Set default permissions for new files and directories |
Unalias |
Delete the specified alias |
unset |
Delete the specified environment variable or shell attribute |
Wait |
Waits for the specified process to complete and returns the outstanding status code |
Bzip2 |
Using Burrows-wheeler block sort text compression algorithm and Huffman coded compression method |
Cat |
List the contents of the specified file |
Chage |
Modify the password expiration date for the specified system user account |
Chfn |
Modify note Information for a specified user account |
Chgrp |
To modify the default genus group for a specified file or directory |
chmod |
Modify system security permissions for a specified file or directory |
Chown |
Modifies the default owner of a specified file or directory |
chpasswd |
Read a login/password to the file and update the password |
Chsh |
Modify the default shell for a specified user account |
Compress |
The original UNIX file compression tool |
Cp |
Copy the specified file to a different location |
Date |
Display dates in various formats |
Df |
Displays statistics on the current disk space for all mounted devices |
Du |
Displays statistics on disk usage for the specified file path |
File |
To view the file type of a specified file |
Find |
Recursive lookup of files |
Finger |
Display information about a user's account on a Linux or remote system |
Free |
View available and used memory on the system |
Grep |
Finds the specified text string in a file |
Groupadd |
Create a new system group |
Groupmod |
Modify an existing system group |
Gzip |
GNU Project compression tool with Lempel-ziv encoding |
Head |
Displays the beginning of the contents of the specified file |
Killall |
Sends a system signal to a running process based on the process name |
Less |
Advanced methods for viewing the contents of a file |
Link |
Create a link to a specified file with an alias |
Ls |
Listing Directory Contents |
Mkdir |
Create the specified directory under the current directory |
More |
Lists the contents of the specified file, pausing after each screen of data |
Mount |
Display a disk device mounted on a virtual file system or mount a disk device to a virtual file system |
Mv |
Rename or move a file |
Nice |
Use different priorities on the system to run commands |
passwd |
Modify the password for a system user account |
Ps |
Displays information about processes running on the system |
Pwd |
Show current directory |
Renice |
To modify the priority of applications running on the system |
Rm |
Delete the specified file |
RmDir |
Delete the specified directory |
Sort |
Organizes data in a data file based on the specified order |
Stat |
Displays file statistics for the specified file |
Sudo |
Run the app as the root user account |
Tail |
Displays the end portion of the specified file content |
Tar |
Archive data and directories into a single file |
Touch |
Create a new empty file or update the timestamp of an existing file |
Top |
Displays the active process and describes important system statistics |
Umount |
Remove a mounted disk device from the virtual file system |
Uptime |
Displays information about how long the system has been running |
Useradd |
Create a new System user account |
Userdel |
Delete an existing system user account |
Usermod |
Modify an existing system user account |
Vmstat |
Generate a detailed on-system memory and CPU usage report |
which |
Find the location of the executable file |
Zip |
Unix versions of Windows PKZIP programs |