Sep 27, 2015 · while IFS= read -r line; do echo "a line: $line" done < file To read the content of a file into a variable, use foo=$(<file). (Note that this trims trailing newlines.)

In bash or zsh, to read a whole file into a variable without invoking cat: Invoking cat in bash or zsh to slurp a file would be considered a Useless Use of Cat. Note that it is not necessary to quote the command substitution to preserve newlines. See: Bash Hacker's Wiki - Command substitution - …

Apr 20, 2021 · To read in from a file, we are going to use while loop that reads in from a stream of characters of the file. We used to read and then a variable that stores the current character. We output the character using echo.

Feb 11, 2024 · In bash scripting, one file can be read with the cat command, with $, using a loop and directly from the command line. In this part, I will give an overview of the four methods to check how one can read a file.

Oct 6, 2009 · Just for reference, the accepted answer in Read a file line by line assigning the value to a variable addresses the problem in a canonical way and should be preferred over the accepted one here. One way to do it is: echo "$p"

Nov 22, 2021 · We make use of the read and cat commands, for loops, while loops, etc to read from the file and iterate over the file line by line with a few lines of script in BASH. We can use the read command to read the contents of a file line by line. We use the -r argument to the read command to avoid any backslash-escaped characters. echo -e "$line\n"

Dec 12, 2021 · Shell scripting offers some functionalities for reading the file, reversing the contents, counting words, lines, etc. Reading line by line: First, we take input using the read command then run the while loop which runs line after line. Script: #!/bin/bash read -p "Enter file name : " filename while read line do echo $line done < $filename

May 28, 2012 · Let us see in this article how to read and parse a file field by field or column by column and extract data from it using the while loop of shell. This article will also explain the usage of shell while loop.

Oct 21, 2023 · One of the simplest ways to read a text file in a Bash script is by using the read command. The read command allows you to read a line from standard input or a file and assign it to a variable. Here is an example:

Dec 27, 2016 · In this article i will show the general syntax of the while read line construction in Bash and an example of how to read a file line by line from the Linux command line. I will also show an example of the Bash script that reads an input file line by line and prints each line with some appended text.