permissions
[root@server ~]# mkdir /myfolder
[root@server ~]# cd /myfolder/
[root@server myfolder]# ls
[root@server myfolder]# whoami
root
[root@server myfolder]# touch test_file
[root@server myfolder]# ls -ld test_file
-rw-r--r-- 1 root root 0 Jul 13 00:06 test_file
Set write permissions to the group only.
[root@server myfolder]# chmod g+w test_file
[root@server myfolder]# ls -ld test_file
-rw-rw-r-- 1 root root 0 Jul 13 00:06 test_file
Remove read permissions for others only.
[root@server myfolder]# chmod o-r test_file
[root@server myfolder]# ls -ld test_file
-rw-rw---- 1 root root 0 Jul 13 00:06 test_file
Assign read, write, execute permissions to others only.
[root@server myfolder]# chmod o=rwx test_file [root@server myfolder]# ls -ld test_file
-rw-rw-rwx 1 root root 0 Jul 13 00:06 test_file
Assign execute permissions to owner, group and others also.
[root@server myfolder]# chmod +x test_file
[root@server myfolder]# ls -ld test_file
-rwxrwxrwx 1 root root 0 Jul 13 00:06 test_file
Remove execute permissions from owner, group and others also.
[root@server myfolder]# chmod -x test_file
[root@server myfolder]# ls -ld test_file
-rw-rw-rw- 1 root root 0 Jul 13 00:06 test_file
[root@server myfolder]# chmod 644 test_file
[root@server myfolder]# ls -ld test_file
-rw-r--r-- 1 root root 0 Jul 13 00:06 test_file
[root@server myfolder]# pwd
/myfolder
[root@server myfolder]# whoami
root
[root@server myfolder]# mkdir dir1
[root@server myfolder]# ls -ld dir1
drwxr-xr-x 2 root root 4096 Jul 13 01:28 dir1
[root@server myfolder]#
[root@server myfolder]# chmod 777 /myfolder
[root@server ~]# su - tom
[tom@server ~]$ whoami
tom
[tom@server ~]$
[tom@server ~]$ pwd
/home/tom
[tom@server ~]$ ls -l total 0
[tom@server ~]$ touch myfile
[tom@server ~]$ ls -l
total 0
-rw-rw-r-- 1 tom tom 0 Jul 12 20:20 myfile [tom@server ~]$ mkdir dir1
[tom@server ~]$ ls -ld dir1
drwxrwxr-x 2 tom tom 4096 Jul 12 20:22 dir1
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