Linux CentOS System Common Command Summary

1. View the system version

Cat/etc/redhat-release

File and directory Operations

Command	parsing
Cd/home	Enter '/home ' directory
Cd..	Return to the top level directory
Cd.. /..	Return to the top level two directory
CD-	Returns the last directory in which
CP file1 File2	Copy File1 to File2
Cp-a Dir1 Dir2	Copy a directory
Cp-a/tmp/dir1.	Copy a directory to the current working directory (. Represents the current directory)
Ls	Viewing files in a directory
Ls-a	Show hidden files
Ls-l	Show more information
Ls-lrt	Show files by Time (l for detailed list, R for reverse sort, t for time sorting)
Pwd	Show work Path
mkdir Dir1	Create ' dir1 ' directory
mkdir Dir1 Dir2	Create two directories at a time
Mkdir-p/tmp/dir1/dir2	Create a directory tree
MV Dir1 Dir2	Move/Rename a directory
Rm-f file1	Delete ' File1 '
RM-RF Dir1	Delete ' Dir1 ' directory and its subdirectory contents

View File Contents

Command	parsing
Cat File1	Forward viewing the contents of a file starting from the first byte
Head-2 file1	View the first two lines of a file
More File1	View the contents of a long file
TAC File1	Reverse view the contents of a file starting from the last line
Tail-3 file1	View the last three lines of a file
VI File	Open and browse files

Text content Processing

Command	parsing
grep str/tmp/test	Find "str" in file '/tmp/test '
grep ^str/tmp/test	Find lines starting with "str" in file '/tmp/test '
grep [0-9]/tmp/test	Find all rows in the '/tmp/test ' file that contain numbers
grep str-r/tmp/*	Find "str" in directory '/TMP ' and its subdirectories
diff File1 File2	Find out where two files differ
Sdiff file1 file2	Shows the difference of two files in a contrasting way
VI File	Operation parsing I Enter edit text mode Esc Exit Edit Text Mode : W Save current changes : Q Do not save Exit VI : Wq Save current changes and Exit VI

Query operations

command	parsing
Find/-name File1	Go to root file system to find files and directories from '/'
Find/-user User1	Find files and directories belonging to user ' User1 '
Find/home/user1-name *.bin	Find files that end with '. bin ' in directory '/Home/user1 '
Find/usr/bin-type F-atime +100	Find execution files that have not been used in the last 100 days
Find/usr/bin-type f-mtime-10	Find files that have been created or modified within 10 days
Locate *.ps	To find files ending with '. ps ', run the ' updatedb ' command first
Find-name ' *. [CH] ' | Xargs grep-e ' expr '	Find ' expr ' in all. C and. h files in the current directory and its subdirectories
Find-type f-print0 | Xargs-r0 grep-f ' expr '	Find ' expr ' in the general file of the current directory and its subdirectories
Find-maxdepth 1-type F | Xargs grep-f ' expr '	Find ' expr ' in the current directory

Compression, decompression

Command	parsing
bzip2 file1	Compression file1
BUNZIP2 file1.bz2	Decompression file1.bz2
Gzip File1	Compression file1
Gzip-9 file1	Maximum compression file1
Gunzip file1.gz	Decompression file1.gz
TAR-CVF Archive.tar File1	Pack the File1 into Archive.tar (-C: Create compressed archives;-V: Show all processes;-F: Use the file name, is required, is the last parameter)
TAR-CVF Archive.tar file1 Dir1	Pack the File1,dir1 into a Archive.tar
TAR-TF Archive.tar	Display the contents of a package
TAR-XVF Archive.tar	Release a Package
TAR-XVF ARCHIVE.TAR-C/tmp	Release the package to the/tmp directory
Zip File1.zip file1	Create a zipped package in zip format
Zip-r file1.zip file1 Dir1	Compress files and directories into a zip-format package
Unzip File1.zip	Unzip a zip-format package to the current directory
Unzip test.zip-d/tmp/	Unzip a zip-format package into the/tmp directory

Yum Installer /tr>

command	resolution
yum-y Insta ll [Package]	download and install an RPM pack
yum localinstall [package.rpm]	Install a RPM package and use your own software warehouse to resolve all dependencies
yum-y update	updates the current system installed RPM Packages
yum Update [package]	update one RPM package
Yum R emove [Package]	Delete an RPM package
yum list	List the current system All packages Installed
yum Search [package]	search for packages in RPM warehouse
Yum clean [package]	Clear Cache directory (/var/cache/yum) packages
yum Clean headers	Delete all header files
yum clean all	Delete all cached packages and header files

Network-related

Command	parsing
Ifconfig eth0	Show the configuration of an Ethernet card
Ifconfig eth0 192.168.1.1 netmask 255.255.255.0	Configure the IP address of the network card
Ifdown eth0	Disabling ' eth0 ' network devices
Ifup eth0	Enable ' eth0 ' network devices
Iwconfig eth1	Show the configuration of a wireless network card
Iwlist Scan	Show Wireless network
IP addr Show	Displays the IP address of the network card

System-related

command	resolution
Su-	Switch to root privileges (differs from SU)
shutdown-h now	shut down
shutdown-r now	restart
top
pstree
man ping	View reference manuals (such as ping commands)
passwd	change password
df-h
cal-3
Cal 1988
date–date ' 1970-01-01 UTC 1427888888 seconds '	Convert a number of seconds relative to 1970-01-01 00:00 to time

Xsheel 5 Related Actions form shortcut keys

Command	parsing
Ctrl + u	Delete the character before the cursor to the beginning of the line
Ctrl + K	Delete the character before the cursor to the end of the line
Ctrl + C	Cancels the current line Input command, which is equivalent to CTRL + BREAK
Ctrl + A	The cursor moves to the beginning (ahead of line), which is equivalent to the usual home key
Ctrl + E	Cursor moves to end of line
Ctrl + F	Move the cursor forward (forward) one character position
Ctrl + b	Move the cursor back (backward) one character position
Ctrl + L	Clear screen, equivalent to executing the clear command
Ctrl + R	Show: hint, find relevant historical commands according to user input (Reverse-i-search)
Ctrl + W	Remove from the beginning of the cursor position until the current word (word)
Ctrl + t	Two characters before the swap cursor position
Ctrl + y	Paste the last word that was deleted
Ctrl + Alt + D	Show Desktop
Alt + b	Move the cursor back (backward) to the previous word
Alt + D	Delete from the cursor position to the end of the current word
Alt + F2	Run
Alt + F4	Close the current window
Alt + F9	Minimize the current window
Alt + F10	Maximize Current Window
Alt + Tab	Toggle Window
Alt + Left button	Move the window (or scroll the mouse wheel in the bottom task bar)

Operation Tips

Middle mouse button: Pastes the highlighted text. (Use the left mouse button to select text.) Point the cursor to the place where you want to paste the text. Click the middle mouse button to paste. )

Tab: Command line Auto-complete. This is the way you can use shell hints. Type the first few characters of a command or file name, and then press the [Tab] key, which automatically complements the command or displays all commands that match the typed characters.

Click the middle mouse button in the blank of the scroll bar: The screen scrolls to that place.

Open the File Manager by pressing/to enter the location directly in the desktop or File Manager.

Press/To enter the Quick search status directly in VI or Firefox.

Site links and images can be directly dragged and dropped to the desktop or directory, can be downloaded right away.

Simply drag files from the File Manager to the terminal to get the full pathname in the terminal.

Linux CentOS System Common Command Summary