Common RedHat commands and common redhat commands

Common RedHat commands and common redhat commands
Common RedHat commands

1. query registration module software

yum list all | grep subscription  

2. Uninstall the Registration Module

yum remove subscription-manager   

3. Restart now

shutdown -r now  

4. decompress the package to the specified path.

tar zxvf /source/kernel.tgz -C /Document  

5. Package compressed files

Tar-cvf/home/www/images.tar/home/www/images packages are packed only, without compressing tar-zcvf/home/www/images.tar.gz/home/www/images packages, compressed with gzip

6. Create a directory

Mkdir-p [recursive creation]

7. Delete non-empty directories

Rmdir (only empty directories can be deleted) // rmdir target directory rm (delete files by default)-r [delete directories]-f [do not want to ask for confirmation] // rm-rf target file

8. Copy an object

Cp (-r [Copy Directory]-p [Keep file attributes during copy] // cp-rp target file directory

9. Move files

Mv (cut file) // target directory of the mv target file (you can change the name of the file when you change the attribute of the target directory to the file name)

10. Create a file

Touch // touch file name

11. View File Content

Cat-n [display row number] // cat-n target file

12. Reverse display of File Content

Tac (for short files)

13. Browse files by PAGE

Mroe (with spaces or F paging, carriage return, and q exit) // more target file less (based on the more command, you can also use up and down arrows to wrap, pgup, pgdown to flip pages, /Add search content search, n jump to the next match, N jump to the first match) // less target file

14. view the file header

Head (the first 10 rows by default)-n [specifies the number of rows] // head-n 5 target file

15. view the end Of the file

Tail (10 rows by default)-n [display the specified number of rows] // tail-n 5 target file

16. Create a connection file

Ln (hard link created by default, real-time update)-s [Create soft connection] // ln-s target directory/[file name]

17. Change File Permissions

Chmod-R [recursive change] // chmod-R 777 target file

18. Change the file owner

Chown // chown target user object

19. File Search

Find-name [search by file name, wildcard *?] -Iname [case-insensitive search by file name]-size [search by file size, + greater than,-less than, default expression equal to]-type [search by type, d is the directory, f is a file]-user [search by user]-group [search by group]-cmin [search by change time, + 2 two minutes ago, -within 2 minutes]-mtime [Based on the modification time, + 2 days ago, -Within 2 days]-a [query condition and connector]-r [query condition or connector] // find-name * keyword * // find-size + 1 M (greater 1 MB files) // find-iname * keyword *

20. Quick file search

Locate (from the Linux File database, which is automatically updated on a regular basis)-I [case-insensitive]

21. Search for the path and alias of a command

Which // which command name

22. Search for specified content in the file

Grep (^ a starts with a)-I [case-insensitive]-v [exclude specified characters] // grep ^ aa a.txt ls | grep-v ^ G

23. View Command help

man // man lsinfo // info ls  

24. view User Logon Information

who  

25. compressed file

Gzip-d [decompress the file] // gzip-d target .gz File

26. Directory packaging and Compression

Tar-c [Package]-v [display details]-f [specify the file name]-z [package and compress]-x [unpack] // tar-zcvf package and compress the file name target file name // tar-zxvf target file name

27. zip file Compression

Zip-r [compressed Directory] // the target file name after zip Compression

28. decompress the zip file

Unzip target file name

29. compress the bz2 File

Biz (only files can be compressed by default)-k [keep files after compression] // biz target file // package directory and compress tar-cjf package and compress compressed file name target file name

30. decompress the bz2 File

Bunzip2-k [decompress and keep the original file] // bunzip2-k target file name // decompress the tar.bz2 file tar-xjf target file name

31. view all installed software

rpm -qa  

32. Uninstall installed software

Rpm-e -- nodeps package name

33. rpm package installation

Rpm-ivh package name

34. configure global environment variables (Java as an example)

export JAVA_HOME=/usr/java/jdk1.7.0_04export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jarexport PATH=$PATH:$JAVA_HOME/bin  

35. Update environment variable configuration information

source /etc/profile  

36. Jump to the last directory

cd -