Free Practice Questions for RedHat EX300 Exam

Save and Exit (:wq)

Then run this:

Optional:

We can change the permission of file/directory either character symbol method or numeric method.

Permission:

r-Read

w-Write

x-Execute Permission Category u- Owner User

g- Owner Group

o- Others

Operators

+ -> Add the Permissions

- ->Remove the Permissions = ->Assign the Permissions Numeric Method:

4 -> Read

2 -> Write

1 -> Execute

Total: 7, total for owner user, owner group member and for others: 777

1. chmod u+rwx /data

2 .chmod g+rwx /data

3. chmod o-rwx /data

or

chmod 770 /data

4 Verify the /data: ls -ld /data

5. You will get drwxrwx---

1. groupadd sysusers groupadd command is used to create the group and all group information is stored in /etc/group file.

chmod g+s /storage

Verify using: ls -ld /stora

Note:

Permission should be like:

drwxrws--- 2 root sysusers 4096 Mar 16 18:08 /storage If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory.

To set the SGID bit: chmod g+s directory

To Remove the SGID bit: chmod g-s directory

usermod -G sysusers jeff

usermod -G sysuser marion

Verify by reading /etc/group file

Note:

Using usermod command we can make user belongs to different group. There are two types of group one primary and another is secondary. Primary group can be only one but user can belong to more than one group as secondary.

usermod -g groupname username - To change the primary group of the user. usermod -G groupname username - To make user belongs to secondary group.

Maintenance mode also known as emergency mode. System boots on emergency mode when file system error occurred. It is due to unknown partition, bad filesystem specified in /etc/fstab. To solve follow the steps: