Linux Admin

What is an inode File systems, in general, have two parts: the  metadata  or the “data” about the data and the  data  itself.  Metadata consist of in…

There is two command to schedule automated task, why should I use cron instead of anacron? What is the difference between the two When we schedule ta…

What is umask and how can it be helpful on linux server When user create a file or directory under Linux or UNIX,  it created with a default set of p…

What is LVM and does it required on Linux servers LVM  is a logical volume manager. It requires to resize filesystem size. This size can be extended …

What basics measures could you take to secure an ssh connection For Linux sysadmins, it is frequent to access servers by ssh. But are we sure the com…

systemd over init system, What do you think Systemd is well designed. It was conceived from the top, not just to fix bugs, but to be a correct implem…

How to check open ports on a remote server without netcat or nmap linux command In the work of sysadmin, we can sometimes want to check open ports on…