Linux Common commands

1. Sync write to disk

2, Chgrp-r Modify the directory or file and its subdirectories and the group belonging to the file

3, Chown-r Modify the directory or file and its subdirectories and the owner of the file

4, Chmod-r 4+2+1 Modify Permissions

For files:

R:4 has read file content permissions

W:2 with Add/query/modify/file content permissions

X:1 with Execute file permissions

For directory:

R:4 with directory or file permissions under the LS directory

W:2 has a new file or directory under the directory, a file or subdirectory in the deleted directory (regardless of subdirectory or file permissions), modifies the name of the file or directory under the directory, moves the directory or the file location

5, Ls-al ~ Show All files in the current directory, including hidden files

6, Ls-l/lib/modules/$ (uname-r)/kernel/fs View system supported file system

7, df-h check Filessystem Overall use of the situation

Df-af

Df-ih

8, RPM-Q software name to see if the software is installed

Linux Common commands