How to Delete Lines from a File Using sed Command?
Sed command stands for Stream Editor, is used to perform basic text transformations in Linux. sed is one of the important command, which plays major role for file manipulation. It can be used to...
Category: Linux Advanced Commands
How To Find Out Linux Operating System (OS) Installation Date And Time?
You may curious to know when the Linux Operating System (OS) was installed on your machine. It could be various reason. But recently i had a requirement to find out this information. The requirement...
Three Ways to Lock and Unlock User Account in Linux
If password policy had already implemented in your organization, then you no need to look for this options. However, if you had set up lock period for 24 hours, in this case you might...
5 Easy Ways To Free Up Space (Remove Unwanted or Junk Files) on Ubuntu
Most of us may perform this action whenever we fall into out of disk space on system. Most of us may perform this action whenever we are running out of space on Linux system...
How To Verify NTP Setup (Sync) is Working or Not In Linux?
NTP stand for Network Time Protocol, which synchronize the clock between computer systems over the network. NTP server keep all the servers in your organization in-sync with an accurate time to perform time based...
Linux Shell Script To Monitor CPU Utilization And Send Email
There are many opensource monitoring tools are available to monitor Linux systems performance. It will send an email alert when the system reaches the given threshold limit. It monitors everything such as CPU utilization,...
Two Methods To Check Or List Installed Security Updates on Redhat (RHEL) And CentOS System
We had wrote two articles in the past about this topic and each articles were published for different requirements. If you would like to check those articles before getting into this topic. Navigate to...
Four Ways To Install Security Updates On Red Hat (RHEL) And CentOS Systems?
Patching of the Linux server is one of important and routine task of Linux admin. Keeping the system with latest patch level is must. It protects your system against unnecessary attack. There are three...
How To Check Available Security Updates On Red Hat (RHEL) And CentOS System?
As per your organization policy you may need to push only security updates due to varies reasons. In most cases, it could be an application compatibility issues. How to do that? Is it possible...
How To Check Whether The Given Package Is Installed Or Not On Debian/Ubuntu System?
We have recently published an article about bulk package installation. While doing that, i was struggled to get the installed package information and did a small google search and found few methods about it....
