How to filter lowercase or uppercase words/letters from a file in Linux ?
Today we will look how to filter lowercase or uppercase letters/words from a file or string in Linux. The easiest way to achieve this task is to use tr command...
Tag: linux
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How to list all commands of a package in Linux OR use of info command ?
Today we will look at a very interesting command “info” to view the commands offered by any package on Linux. On redhat based systems, we can also use the rpm...
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How to create a new folder & cd into the created folder in a single command ?
In this post we will show you a quick tip how can we create a new folder and jump into it. We can use this trick in shell script to...
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How to add line number in the command output or to a file in Linux ?
Suppose you want to add line numbers to the output of some command or when reading any file. In this post we will look at a quick tip how to...
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How to see different PROCESS STATE CODES available in our Linux system ?
In this post, we will see how to list different process state codes which are available on our Linux system. To see the the process state code, you can see...
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How to count words in a file without using wc command ?
To count number of words in a file, we can either use wc command, or use a loop or can use extended grep command. Lets see the easiest two approaches...
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How to perform temporary and permanent kernel parameter tuning in linux ?
In this post, we will look how to tune/change Linux kernel parameters temporarily or permanent. To change/verify the parameters we will use sysctl command. From its man page, we can...
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Default User Home directory in Linux and solaris ?
Do you know what is the default home directory of a user in Linux and Solaris ? In this post, we will look at the difference between default user home...
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Use of exec command in linux bash shell
In this article we will look at the usage of exec command in linux. Lets see an example to understand exec command usage. Usage of exec Command ### Check...
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How to create a custom user command in Linux quickly ?
Today we will check how to create a custom user command in Linux easily. Lets see the procedure step by step. The easiest way is to create a function and...