How to Find and Replace a String in File Using the sed Command in Linux
When you are working on text files you may need to find and replace a string in the file. Sed command is mostly used to replace the text in a file. This can be...
Author: Magesh Maruthamuthu
Bash Script to Send a Mail About New User Account Creation
For some purposes you may need to keep track of new user creation details on Linux. Also, you may need to send the details by mail. This may be part of the audit objective...
How to Get Average CPU and Memory Usage from SAR Reports Using the Bash Script
Most Linux administrator monitor system performance with SAR report because it collects performance data for a week. But you can easily extend this to four weeks by making changes to the “/etc/sysconfig/sysstat” file. Also,...
Three Ways to Exclude Specific Packages from Yum Update
As part of system update, you may need to exclude few of the packages due to application dependency in Red Hat based system. If so, how to exclude and what are all the ways...
Five Ways to Check How Long a Process Has Been Running in Linux
If you want to figure out how long a process has been running in Linux for some reason. We can easily check with the help of “ps” command. It shows, the given process uptime...
How to delete lines from a file using the sed command
Sed command stands for Stream Editor, It is used to perform basic text transformations in Linux. sed is one of the important command, which plays major role in file manipulations. It can be used...
How to set up Automatic Security Update (Unattended Upgrades) on Debian/Ubuntu
One of an important task for Linux admins to make the system up-to-date. It keeps your system more stable and secured. Installing a package in Linux is a piece of cake in the similar...
How to check Linux Operating System (OS) installation Date And Time
Are you curious to check when the Linux Operating System (OS) was installed on your machine ? It could be for various reasons. Recently I had a requirement to find out this information. We...
How to upgrade Linux Mint 19.1 (Tessa) to Linux Mint 19.2 (Tina)
Linux Mint 19.2 “Tina” was released on Aug 02nd 2019, it is a long term support release, which is based on Ubuntu 18.04 LTS (Bionic Beaver). It will be supported until 2023. It comes...
How to upgrade Debian 9 (Stretch) to Debian 10 (Buster)
Debian 10 “Buster” was released on July 06th 2019, after 25 months of development with lot of new features and updated packages. It’s Long Term Support (LTS) release and will be supported for the...
