Any program completes execution under the UNIX or Linux system, it returns a status back to the system. This status is a number that usually indicates whether the program successfully [ … ]
Category: Shell Script
Cut Command
The cut command in UNIX or Linux is used to select sections of text from each line of files. It is used to select fields or columns from a line [ … ]
Grep
The word grep
Redirectors
The shell and many UNIX commands take their input from standard input (STDIN), write output to standard output (STDOUT), and write error output to standard error (STDERR). By default , [ … ]
Types of Quotes There Rules & Situation
There are two types of quotes. They are (i) Single Quotes (ii) Double Quotes i) Single Quotes:In single quotes all the characters including special characters are treated as normal characters. [ … ]
Meta Characters & Backslash
Metacharacters: Most of the shell special characters are called as metacharacters. They are * / [ ] ‘ ” \ $ ; & ( ) | ^ < > new [ … ]
Wild Cards
Wildcards are the shell features. It make the command line more powerful than GUI file managers. If we want to select a big group of files in a graphical file [ … ]
Read Command
To get the input from the keyboard, the read command is used. It takes the input the input and assigns it to a variable.The read command is of two types [ … ]
Environment Variables
An environment variable is a variable that is available to any child process of the shell. Some programs need environment variables in order to function correctly. Usually a shell script [ … ]
Unset Variable and Readonly Variable
Unset Variable: The shell built-in unset command is used for unsetting the data that an initialized variable is holding. Syntax: unset <Variable Name> Example: unset name The above example will [ … ]