How to Change the Permissions and Ownership of Files in Linux
The command used to change permissions from the command line is chmod, which means “change mode” …
Linux
How to Control Processes in Linux Using Bg, Fg and Jobs Commands
Describing Jobs and Sessions Job control is a feature of the shell which allows a single shell instance to run and …
How to Control the Default Permissions of New Files Created by Users Using "Umask"
Default File Permissions When you create a new file or directory, it is assigned initial permissions. There are two …
How to Create, Modify, and Delete Local Group Accounts in Linux
A group must exist before a user can be added to that group. Several command-line tools are used to manage local group …
How to Create, Modify, and Delete Local User Accounts in Linux
A number of command-line tools can be used to manage local user accounts. Creating Users from the Command Line The …
How to Kill Processes in Linux Using - Kill, Pkill, Killall
Process Control Using Signals A signal is a software interrupt delivered to a process. Signals report events to an …
How to Set a Password Management Policy for Users, and Manually Lock and Unlock User Accounts in CentOS/RHEL
shadow passwords and password policy At one time, encrypted passwords were stored in the world-readable /etc/passwd file. …
How to Switch User Account and Configure Sudo in Linux
The SuperUser Most operating systems have some sort of superuser, a user that has all power over the system. In Linux, …
Interpreting Displayed Load Average Values in "Uptime" Command Output
Describing Load Average Load average is a measurement provided by the Linux kernel that is a simple way to represent the …
Understanding 'Top' Command Output Fields in Linux
Real-Time Process Monitoring The top program is a dynamic view of the system’s processes, displaying a summary …
Understanding Linux Special Permissions - Sticky Bit, SUID, SGID
Special Permissions Special permissions constitute a fourth permission type in addition to the basic user, group, and …