Linux Shell Common directives

1. Man helps explain commands you are familiar with or unfamiliar with

Eg:man ls to view LS-related usage

Note: Press the Q key or CTRL + C to exit, under Linux you can use CTRL + C to terminate the current program run.

2. LS to view the directory or the properties of the file, listed as a directory below the file

Eg:ls/usr/man

Ls-l

A.D represents the directory, if it is a "-" represents a file, if L is a connection file (link)

B. Represents a file or directory permission permission. Separate with readable (R), writable (w), can be run (x).

3. CP Copy File

EG:CP filename1 filename2//copy filename1 to Filename2

CP 1.c NETSEEK/2.C//1.c Copy to Netseek directory named 2.c

4. RM Delete files and directories

EG:RM 1.c//delete 1.c this file

5. MV Remove directory or change file name

EG:MV filename1 filename2//renamed filename1 to Filename2

MV Qib.tgz. /QIB.TGZ//move to the top level directory

6. CD changes the current directory

EG:CD Netseek//Enter Netseek this directory

CD//Exit current directory

Cd.. Switch to the previous level directory

CD-//Switch to previous directory

7. Cat, more commands

Displays the contents of a file. The two commands differ: The cat prints the contents of the file, while the more is displayed on a split screen

eg CAT>1.C//You can paste the code into the 1.c file, press Ctrl+d to save the code.

Cat 1.c or more 1.c//can view content inside.

Gcc-o 1 1.c//compile 1.c into an. exe file, we can compile the code with this command.

8.chmod Command Permission modification usage: chmod one 8 binary number filename.

Eg:chmod u+x filenmame//Just want to run for themselves, others can only read

U represents the file owner, and G represents the group where the file is located. o denotes others; R table readable, W table writable, x table can be run

chmod g+x filename//Same group of people to perform

9. Clear, date command

Clear: Clear screen, quite with DOS Cls;date: Displays the current time.

Mount Mount A hardware device umount Uninstall device

Usage: Mount [parameter] mount point of the device to be mounted

Eg:mount/dev/cdrom

Cd/mnt/cdrom//Enter the disc directory

One. su switches to another person's identity without exiting the login

Usage: SU-L User name (if user name is default, switch to root state)

Eg:su-l netseek (Switch to netseek This user, will be prompted to enter the password)

Whoami,whereis,which,id .

WHOAMI: Confirming your identity

Whereis: Query the directory where the command resides and the directory where the Help document resides

Which: Query the directory where the command is located (similar to Whereis)

ID: Print out your UID and GID. (UID: A unique identification of the user identity.) GID: User group identity unique identity. Each user can only have a unique UID and GID)

Eg:whoami//Display your self-logged in user name

Whereis bin Displays the directory where the bin is located and will be displayed as:/usr/local/bin

Which bin

Grep,find .

grep: text content search; find: File or directory name, and permissions belong to the main matching search

EG:GREP Success */* Find files containing success characters in all files under the current directory

Kill kills a process that is running or is already in the Dest state

eg Kill Ax

passwd can set the password

The commands used by the history user

Eg:history//can display commands used by the user in the past

.pwd View the current directory full path

EG:PWD//view current directory path

mkdir Creating a directory

Eg:mkdir Netseek//create Netseek this directory

. Tar decompression command

EG:TAR-ZXVF nmap-3.45.tgz//unzip this into the nmap-3.45 directory.

finger can allow users to query some other user's information

Eg:finger//View the user's usage profile

Finger root//view root information

shutdown, halt, reboot shutdown or restart commands

Eg:shutdown-h now//shutdown immediately

fdisk view disk partition status

EG:FDISK-L//view disk partition status

Ping to see if the network is connected

ifconfig View or configure network-related parameters, such as IP address

Eg:ifconfig eth0 192.168.2.20//Set IP address

uname Display information about the current operating system

Linux Shell Common directives