Linux commands frequently used in work __linux

As a Java programmer, online is essential work, and online is generally in the Linux environment, so know some commonly used Linux commands are still very necessary, the following is the actual work I often use the Linux command.

1. View current path

Pwd

2, view all files under the current folder

ll

3. View mount Information

Df-h

4, into a directory

CD path

5, back to the superior directory

Cd..

6, Compression

TAR-CVZF definition name. tar.gz folder

For example:

Tar-cvzf CucPayPerson20130410.tar.gz Cucpayperson

7, decompression

TAR-XVZF Compressed Package Name

8. Transfer file commands between servers

SCP file User @ip Address: path

For example:

9. Copy all the files under a folder A to another folder B

CP-RF/... /a/*/... /b/

10. Delete Folder A

RM-RF A

11. Copy A.text and rename it to B.text

CP A.text B.text

12, will a.txt renamed as B.txt

MV A.txt B.txt

13. New User

Useradd-d-weighted catalogue username

14, set the password

passwd username

15. Modify a text file
For example CucPay.log, first go to modify:

VI CucPay.log

At this point, or can not be modified, you need to press I to enter the modification, after the modification, press ESC to exit modify the interface, at this time there are two options: (1) Press: Wq Save content (2) Press: q! Force exit without saving the content.

16. View Port

Lsof-i: Port number

Or:

Netstat-an|grep Port number

17, Telnet connection test (I am generally used to measure the connectivity with a host)

Telnet IP (space) port number
Telnet 192.168.8.1 2012

You can also ping to see what routing ip

Ping IP

18, display the current user's environment variables

Env

19, view the Linux version of the method

Cat/etc/redhat-release (valid only for Redhat Linux)

Or

Lsb_release-a

20. View all Java processes

Ps-ef|grep Java

21. View a single process

Ps-aux|grep process ID (derived from above)

You can also view the process based on the process name:

Ps-ef|grep Process Name

22. Stop a process
To get the process number according to the port number:

Lsof-i: Port number

Kill Process:

Kill-9 Process ID

23. View dynamically refreshed logs

tail-200f log file (last 200 lines of dynamic trace file)

24. Execute script file
The general script file ends with. SH and is executed in the following manner:

./startup.sh (./means to execute the script file under the current path)

You can also perform in the background:

Nohup./startup.sh & (nohup means background execution)

Over