A Shell script is a nothing but a sequence of commands written to achieve a specific task. For example: echo “script to create a file”touch File1echo “File created” What is the need of Shell Script? A script helps to automate tasks. For instance, if you are required to execute 20 commands every day, you will […]
The topic of this post may seem trivial, but many students do not understand the difference between read, write and execute permissions for file and directory. For example, what is the point of assigning execute permission to directory? It’s never going to run. So, in this discussion we are going to clarify all such doubts. […]
The output of a process can be either redirected to a file or to another process i.e., the output of a command will not appear on the screen but will be saved in a file or it can act as an input of another command. The redirection operators like >, >>, &>, 2> etc are […]
Links in Linux are like Short-cuts in Windows. We create a shortcut for a file/folder in Windows so that the original file can be accessed from multiple locations. The same concept goes for links. Links help to access the file from multiple directories. Before we learn how to create links using ln command in Linux, […]
mv command in Linux is used to move files from one directory to another. This is similar to cut-paste operation. mv command can also be used to rename files. Syntax $ mv [OPTION]…SOURCE…Directory The SOURCE here means all the files that you want to move and the last argument must be a Directory where you […]
The cp command in Linux is used to copy files and directories. Syntax $cp [OPTION]… SOURCE…Directory The SOURCE here means all the files that you want to copy and the last argument must be a Directory where you want to copy the files For Example $cp notes.txt D1 will copy the file notes.txt to directory […]
Have you ever used the stat command? If yes, then a common question asked is what is the difference between access, modification and change time? Access Time: is the time when the file was last accessed or read. For example, using the cat, head or an editor. But remember you did not modify the contents. […]
rmdir command in Linux is used to delete empty directories. Empty directory means a directory which do not have files or sub-directories. So, lets learn how to use mkdir command in Linux. Syntax $rmdir [OPTION]…DIRECTORY… Example The example above shows the deletion of directory Dir using rmdir command in Linux. Options used with rmdir in […]
mkdir command in Linux is used to create new directories. What you call Folders in Windows are called Directories in Linux. Creating directories is important as they help to organize the files. So, lets learn how to use mkdir command in Linux. Syntax mkdir [OPTION]…DIRECTORY… creates directories if they do not already exist. Example the […]
man is the system’s manual pager. The man command in Linux is an interface to the on-line reference manuals. It is best place to understand any command in Linux. So, lets see how to use man command in Linux? Syntax $man <argument> Example $man ls will display the manual page for ls command Description A […]