chmod 744

Each file and directory in a Linux system has access permission to determine who can access and manipulate files and directories in any way. File or directory access is divided into read-only, write-only and executable three kinds. In the case of a

chmod Command[Email protected] ~]# ls-lTotal 104Drwxr-xr-x. 3 root root 4096 Jul 2 22:34 222See here Drwxr-xr-x , R=4,w=2,x=1, so rwx=4+2+1=7,r-x=4+1=5, r-x=4+1=5, Therefore, the file permission can be represented as 755[email protected] ~]# chmod 74

The mode of the fileWhen you use the LS-L command to view directory content[Email protected] cmdline]$ ls-l/etc/passwd-rw-r--r-- 1 root root 1917 Jul 2 15:01/etc/passwdThe first column field is the file mode. The first character represents the file

Command note chmod, umaskChange the chmod format: chmod [who] [+ 1-1 =] [mode] fileName parameter: who = u, g o, a mode: +-= permission alphanumeric combination: R-4 W-2 X-1 r-x-5 r --- 4 -- X-1 # chmod u = rwx, g = r --, o = r -- 123.txt# chmod 744

Changing access rights chmodFormat: chmod [Who][+1-1=][mode] FileNameParameters: Who=u, g O, aMode: +-=Rights alphanumeric combination: R-4 w-2 x-1 r-x-5 r---4--x-1#chmod u=rwx,g=r--, o=r--123.txt#chmod 744 123.txt#ls-L 123.txt-rwxr--r--1 root root 1

Chmod: Change File Permissions Symbol mode: The general format of the CHMOD command is:Chmod [who] OPERATOR [permission] filename Who indicates:U file owner permissionG. permissions of users in the same groupO other User PermissionsA All users

I. Description of permissions-rw-r–r–: This is the permission bit for a file. Let's start with this permission bit:First bar: Specifies the file type, which indicates that the file is a normal file. (Most of the files you create are normal files or

This article mainly introduces some Linux shell in the relevant knowledge summary, so that the basics of Linux introductory learning, need friends can refer to the Once a file is created, it has three ways to access it: 1) Read, you can display

Once a file is created, it has three ways to access it:1) Read, you can display the contents of the file.2) write, you can edit or delete it.3 Execute if the file is an S H e l l script or program.The permissions of a file can be grouped into three

When creating a file, the system saves all information about the file, including: • File location. • File type. • File length. • Which User owns the file and which user can access the file. • I node. • File modification time. • File Permission bit.