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What is read command in bash?
read is a bash built-in command that reads a line from the standard input (or from the file descriptor) and split the line into words. The first word is assigned to the first name, the second one to the second name, and so on. The general syntax of the read built-in takes the following form: read [options] [name…]
Which command is used to read a file in Linux?
There are some commands such as cat, ls, that are used to read files from the terminal. In Linux, we can display various file formats such as text file, audio files, video, image, doc, pdf, or any other file contents. Following are some useful ways to open a file from the terminal: Open the file using cat command.
How do I read a bash file?
How to Read a File Line By Line in Bash. The input file ( $input ) is the name of the file you need use by the read command. The read command reads the file line by line, assigning each line to the $line bash shell variable. Once all lines are read from the file the bash while loop will stop.
How to read input from the command line?
You can add it to your project by executing the following command: It is relatively easy to use prompt than the readline module. You don’t need to explicitly configure readable and writable streams. The prompt module makes it easier to securely ask the user to input a password.
How to read user input from BASH script?
To read the Bash user input, we use the built-in Bash command called read. It takes input from the user and assigns it to the variable. It reads only a single line from the Bash shell. Below is the syntax for its implementation. Follow the given examples to read user input from the Bash Script:
When to use the READ command in Java?
This comes in handy when writing a script that requires the user to input several different pieces of information. The read command comes with the -p (prompt) option, which displays a prompt to allow user input. When using the prompt option it requires text as an argument. This can be a brief explanation of what kind of input you are expecting.
How to use READ command prompt in Bash?
The read command comes with the -p(prompt) option, which displays a prompt to allow user input. When using the prompt option it requires text as an argument. This can be a brief explanation of what kind of input you are expecting.