How do you read the contents of a file in Unix shell script?

Reading File Content Using Script

#!/bin/bash.
file=’read_file.txt’
i=1.
while read line; do.
#Reading each line.
echo “Line No. $ i : $line”
i=$((i+1))
done < $file.

How do you read a file line by line in Unix while loop?

The following syntax is used for bash shell to read a file using while loop:

while read -r line; do. echo “$line” ; done < input.file.
while IFS= read -r line; do. echo $line; done < input.file.
$ while read line; do. echo $line; done < OS.txt.
#!/bin/bash. filename=’OS.txt’ n=1.
#!/bin/bash. filename=$1. while read line; do.

How do you read a specific line in a shell script?

Using the head and tail commands, we can easily get the first and last parts of a file.

First, we get line 1 to X using the head command: head -n X input.
Then, we pipe the result from the first step to the tail command to get the last line: head -n X input | tail -1.

How read a file line by line in Linux shell script?

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 do you display the contents of a file on the terminal?

You can also use the cat command to display the contents of one or more files on your screen. Combining the cat command with the pg command allows you to read the contents of a file one full screen at a time. You can also display the contents of files by using input and output redirection.

How do you display a specific line in a file in Unix?

To do this, press Esc , type the line number, and then press Shift-g . If you press Esc and then Shift-g without specifying a line number, it will take you to the last line in the file.

How do you read a command line argument in Unix?

Simply list the arguments on the command line when running a shell script. In the shell script, $0 is the name of the command run (usually the name of the shell script file); $1 is the first argument, $2 is the second argument, $3 is the third argument, etc…

How do I view the contents of a file or folder?

Alternative method

Open the program you want to use to view the file.
Once the program is opened, from the file menu, select Open or use the keyboard shortcut Ctrl + O .
In the Open window, browse to the location of the file, select the file, and then click OK or Open.

How do you open a file in Unix?

open command – OS X specific command to open any file. View a text file called foo.txt on a Linux or Unix-like systems Open the Terminal application and type the following command to view a text file called foo.txt using cat command: