Three types of permission read write and execute, Ever file and folder have three relations owner group and
others
[ Read = r write = w execute = x ] [ owner = u group = g other = o ]
[root@pc1 ~] # Ls -Ld /disk
1= nature of object [d=dir -=file L=link] 2= first three permission for owner [ rwx ] 3= second three permission for group members [ r-x] 4= third three permission for others [r-x] 5= number of inodes contain by this directory 6= owner of directory 7= group of directory 8= size of directory 9= creating date of object 10= name of object [root@pc1 ~] # Ls -L /disk Drwxr-xr – x 2 root root 4096 Jan 1 1988 dir1 Drwxr-xr – x 2 root root 4096 Jan 1 1988 dir2 Drwxr-xr – x 2 root root 4096 Jan 1 1988 dir3 Changing permission = give write permission to other on /disk [root@pc1 ~] # chmod 0+w /disk Give read write and execute permission for group on /disk [root@pc1 ~] # chmod g+rwx /disk Assigning read writ and execute permission to user, group and other with single command [root@pc1 ~] # chmod u+rwx , g+rwx, o – rwx /disk Assigning different permission with different commands which separate with semicolon [root@pc1 ~] # chmod u+rwx /disk ; chmod g+rwx /disk ; chmod 0+rx /disk Using number system =----- [ Read = 4 ] [ Write = 2 ] [ Execute = 1 ] rwx=7 r-x=5 ---=0 Assigning full permission to owner and no permission for group and others [root@pc1 ~] # chmod 700 /disk Assigning full permission for owner and group no permission for other [root@pc1 ~] # chmod 700 /disk Assigning full permission to all [root@pc1 ~] # chmod 777 /disk Assigning full permission for owner and read, and execute for group and others [root@pc1 ~] # chmod 755 /disk Assigning no permission for all [root@pc1 ~] # chmod 000 /disk Assigning sticky bit permission for other [root@pc1 ~] # chmod o+t /disk Assigning suid permission for owner [root@pc1 ~] # chmod u+s /disk Assigning sgid permission for group Source : http://www.computerfreetips.com
No comments:
Post a Comment