Linux Common commands

1. ls command: (list) List Directory contents

format ls [parameter] [file or directory]     -A displays all files, including hidden files, special files, and so on.     -l  Use a list of detailed formats,    abbreviated LL-H friendly display information ll-h file information header: D directory,-normal file, L link

2.CD Command: Switch directories

Cd.. /  //directory name, switch to the specified directory (absolute path) such as: cd/usr/~, equivalent toCD/-   , switch to the last accessed directory PWD Displays the absolute path of the current directory

3.mkdir command: Create a directory

Format mkdir folder name  
Example: mkdir Java (Create a subfolder named Java under the current folder)
-P Parent Directory does not exist when the parent directory is generated, such as: mkdir-p java2/javarmdir command: Delete empty directory, such as: RmDir java

4. File Browse command

cat [filename] Quick View Current file name, suitable for a small amount of information file more [file name] Paging display file content     operation: Enter down n lines, need to be defined. Default 1 line                space bar scroll down one screen                B return to the previous                screen -digital file name, quickly view the contents of the X-line after the file, such as: Tail-10 tomcat/logs/catalina.out

5.CP command: Copying files

CP [file to be copied] [path/-R [file to be copied] [path], copy folder

6.MV command: Move files

MV  [file to be moved] [path/-F [file to be moved] [path]  directly overwrite

7.rm command: Delete files

RM  FileName [ Path/-f [filename] [path]  -rf [file name] [path]  Delete directory such as: rm-rf/usr/-rf * Delete all contents of the current directory

8. Find commands

such as: Find/root-name ' java* '

9. Document editing commands

Vim [path/ filename]  into the general mode, you can file browsing, copying files. Insert mode: Enter the editable state, in the general mode, press A, I, o three one can be, press: to cut into the low-line mode. General mode: Insert mode press ESC Low line mode: Exit, save. : Q! Forced exit: Wq hold and exit

10. Piping commands and grep commands

-I [character to find] [file name  ]-| command 2| |

11. Compress and Unzip commands (important)

Linux Compression Pack: *.tar: Package, do not compress file size; *  . tar.gz: Package, and compress the file tar command parameters    : -z whether to use gzip compression (. gz)    -C Compressed file instructions     -x Extract compressed file instructions     -v Compress (unzip) the display file    during the process -F Specify the file name, after F to immediately answer the file name  commonly used compression parameter combination    ZCVF Common decompression parameter combination    zxvf-ZCVF [Compress package name. tar.gz] [content to compress]  
For example: Tar-
such as: TAR-ZXVF java.tar.gz-c/root, if not added-

12. System commands

PS Command: View process -e: View All Programs --ef|grep-i [process name] view processes associated with the process name, such as: Ps-ef|grep-i  -9 [PID]  forces the PID process to be killed

13. Other Commands

ifconfig View network configuration (IP) ping [IP] view connectivity to the target, constantly test the connection, press CTRL+C to stop reboot restart command halt shutdown command Setup network settings (firewall configuration, network configuration)
chmod Modify Permissions    Modify file permissions syntax chmod [permissions settings] [file to change permissions]    for example chmod u=rwx startup.sh Modify the permissions of the owning user to rwx (user) chmod g<            /c4>=r-x startup.sh Modify the permissions of the owning group to RX (group)            chmod o=r--startup.sh Modify the permissions of the owning group to r-- (other)            chmod a =rwx startup.sh  Modify permissions for all users to rwx (all)    -R [permission settings] [file to change permissions]      -R u=rwx tomcat/  Bin Modify the permissions of the owning user in the bin directory to rwx            (user)

Linux Common commands