How do I read a while loop in Unix?

How do I read a while loop in Unix?

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

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

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

Reading File Content Using Script

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

How do you read a file 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 I run a .KSH file?

GUI method to run . sh file

1. Select the file using mouse.
2. Right-click on the file.
3. Choose Properties:
4. Click Permissions tab.
5. Select Allow executing file as a program:
6. Now click the file name and you will be prompted. Select “Run in the terminal” and it will get executed in the terminal.

How do I show the contents of a file in Terminal?

Use the command line to navigate to the Desktop, and then type cat myFile. txt . This will print the contents of the file to your command line.

How do I fetch a file in Linux?

There are various ways to open a file in a Linux system….Open File in Linux

1. Open the file using cat command.
2. Open the file using less command.
3. Open the file using more command.
4. Open the file using nl command.
5. Open the file using gnome-open command.
6. Open the file using head command.
7. Open the file using tail command.

How do I run a KSH file in Linux?

How do I run . sh file shell script in Linux?

1. Open the Terminal application on Linux or Unix.
2. Create a new script file with .sh extension using a text editor.
3. Write the script file using nano script-name-here.sh.
4. Set execute permission on your script using chmod command : chmod +x script-name-here.sh.
5. To run your script :

How do I read a file line by line using Ksh?

H ow do I read a file line by line using KSH shell scripting under UNIX like operating systems? You can use the while loop and read command to read a text file line by line under KSH. In this example, you are reading file separated by | fields.

What is a while loop in shell scripts?

Shell scripts will frequently need to read the contents of a file, line by line, and store each line in a shell variable for additional processing. Using a while loop coupled with a read statement is a perfect way to accomplish this task.

How does a while loop read a line from a file?

The while loop reads a line from the file, and the execution flow of the little program passes to the body of the loop. Psssst: How do I transfer files from my Android phone to my computer wirelessly?

How to read a file line by line in Bash?

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.