In this article, we will see Find and replace in Vi or vim editor with examples. IN Vim or vi, we can easily find and replace text using :s(:substitute) command. We can run this command only in normal mode. To go back to normal mode just press on ESC key from your keyboard. Find and replace operation is case-sensitive which means “R2schools” and “r2schools” are not same.
:[range]s/{pattern}/{string}/[flags] [count]
In this article, we will see File test operators in Linux shell script with examples.
In linux and unix operating systems every thing is a file. When you are using files in your shell or bash script, it is a good idea to do some tests on the file before using it.
The file tests include:
Checking for existence of the file.
File is readable, writeable or executable.
File is empty or non-empty
Type of the file and so on. Continue reading File test operators in Linux shell script
In this article, we will see 8 ways to delete or empty the content of file in Linux.
In Linux terminal, we have to delete or empty the content of file(s) from terminal or in shell scripts. We can achieve this by various methods. We will delete only the data of file but not the file. Continue reading How to delete or empty the content of file in Linux
In this article, we will see how to create file with today date appending in Linux. We can create files using different commands like cat, vi, touch,.. by appending date command with format settings.
Create file with today date appending in Linux: Continue reading How to create file with today date appending in Linux
In this article, we will see different methods to find the RHEL(red hat) version.
As a new RHEL(Red Hat Enterprise Linux) administrator or user or new to RHEL environment and you want to know version of RHEL.
How to find the RHEL version: Continue reading How to find the RHEL(red hat) version
In this article, we have explained Difference between find and locate command in Linux
| find | locate |
|---|---|
| It searches directly in the file system for the required files and directories | It searches in the database for the required files and directory |
| find command has number of options and easy to customized based on our requirement. | locate command has very few options |
| We can find files based on name, size,type,depth,age,user,group, permissions etc | We can find files only based on name and permissions |
| We can reduce the depth of search | We cannot reduce depth of search |
In this article, we will see how to copy folder with files to another folder in Linux.
We can do this by using Linux cp command with -R option. Following the syntax to copy folder with files to another folder in Linux:
Continue reading How to copy folder with files to another folder in Linux
In this article, we will see how to create symlink in Linux.
Symlink or Symbolic link or Soft Link: are similar to shortcuts, and can point to another file or directory in any file system.
Continue reading How to create symlink in Linux
In this article, we will see how to change default editor for crontab. The crontab -e command will check the environment variables $EDITOR and $VISUAL for an override of the default text editor.
Now we are going to change the default editor for crontab to vi or vim.
In this video, we will see how to schedule a job in Linux using cron.
cron is a system process or daemon running on a Linux system and has a responsibility to detect and execute a certain cron job in a given time period. cron job is any defined task to run in a given time period. It can be a shell script or a simple bash command. Cron job helps us automate our routine task, it can be hourly, daily, monthly, or a given interval of period.
Continue reading How to schedule a job in Linux using cron