linux

ls command list all the file and directory name present in the current directory. Syntax:

Example: Print the name of all the directory and file available in the current directory.

Above command display four file and directory name. Check availability of file or directory: We can check whether a particular file or directory … Read more

rmdir stands for remove directory. In the UNIX file system, we can remove directory by using rmdir command. Syntax:

Note: In above syntax in the place of [directory name] we will specify the name of the directory to be removed. Example:

The directory abc is removed. To confirm directory is created press “ls” … Read more

“ wc ” command stands for “word count”. “ wc “ command in Unix/Linux OS is used to calculate/find out and print the number of lines, number of words, number of character and byte of a file. Syntax: $ wc [option] [filename] Example: There is a sample file file01.txt.

Type command on terminal…

… Read more

“rm” command is used to remove/delete files. this command can delete more than one file at a time. “rm” command can also delete the specific file from the directory. Syntax:

Example: Suppose we want to delete a file Mybook01 then the command is as follows:

Note: File ones delete can’t be regained. Delete … Read more

Command tee displays the output of the command and at the same time it saves this output in a file specified by the user. “tee” command can be used anywhere along with pipeline. Example: Suppose we have a file Data.txt as shown below and we want to see the content of this file and at … Read more

Command sort is used to display/arrange the content of the text file in ascending or descending order. By default, sort command sorts the entire lines. Syntax:

Example: Suppose we have a file Employee.txt as shown below and we want to sort the content of the file and display at the terminal. By default sort … Read more

Like a C language, in UNIX “ printf ” is used to print the statement. “ printf “ command is an alternative of “echo” command. Print statement: To print any statement write “printf” command in terminal and the in the double quote ” ” write a sentence to be print. Whatever you will write in … Read more

bc command is used to perform the basic calculation. Example: To add two number write “bc” command on terminal and press enter then specify two number as mention below for addition.

Note: bc command print the result of computation in next line as shown above. Perform multiple calculations: we can perform multiple calculations on … Read more

mkdir stands for make directory. In the UNIX file system, we can create a new directory by using mkdir command. Syntax:

Note: In above syntax in the place of [directory name] we will specify the name of directory to be created. Example:

The directory abc is created. To confirm directory is created press … Read more

cat command is used to see the content of the file. cat command is also used to concatenate two or more file. cat command is also used to create new files. Syntax:

Suppose we have two files Employee.txt and Data.txt as shown below:

File 1: Employee.txt File 2: Data.txt Example: To see the … Read more