Different ways to create a file in Linux ?
Today we will look at a very basic article to know various ways to create a file in linux. Lets see the various commands below. 1. Touch command [root@ngelinux ]#...
Tag: linux
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How to make variables as read only in bash shell linux ?
Variables in Linux can be made read only using the keyword “readonly”. For example, if we want a variable to contain a value say 10 and must not be changed...
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How to update RHEL, or centos major release version: from RHEL 5 to RHEL 6, or from RHEL6 to RHEL 7 ?
Today in this post, we will look how to perform redhat or centos major release upgrade. I. RHEL 5 to RHEL 6 a. In-place upgrades between major RHEL versions...
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What is IFS in linux bash shell ?
1. Introduction IFS stands for Internal Field Separator in Linux. $IFS is one of the system variable with default value “space, tab, and a new line”. This system variable signifies...
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How to color a text/string in linux bash shell & make it blink ?
An interesting thing to do when creating shell scripts is to know how to color some text/output and blink it. Today in this article , we will look how to...
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What are different types of positional parameters available in linux ?
Positional parameters as its name suggests are different positional variables automatically defined by linux shell. The shell automatically assigns the passed parameters according to their position in 9 different parameters(1...
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How to mount a filesystem from backup superblock location ?
Let us look how to mount a filesystem from backup superblock location. In general this is not required, however sometimes in case you feel issue with primary superblock, this way...
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How to search and replace text where line contains some specific string in Linux shell ?
Today we will look how to search some text in a file and replace specific string on the searched line. For this, we will use sed command i.e. Linux Stream...