Introduction
In this article, we will learn how to display the output of the xterm command terminal screen using cron. This is particularly useful for running scripts and scheduling tasks automatically in a Unix-like operating system.
What is Cron?
Cron is a job scheduler in Unix-like operating systems. It allows tasks to be automatically run in the background at regular intervals. Cron is typically used to schedule scripts or commands to run periodically (e.g., daily, hourly, monthly).
What is xterm?
xterm is a terminal emulator for the X Window System. It provides a command-line interface for interacting with the operating system. xterm can be used to run commands, scripts, and programs.
Displaying the Output of xterm using Cron
To display the output of an xterm command terminal screen using cron, we need to create a script that runs the xterm command and redirects its output to a file. We can then schedule the script to run periodically using cron.
#!/bin/bash
# Redirect the output of xterm to a file
xterm -hold -e "command-to-be-executed" > output.txt
In the above script, we are using the xterm command with the -hold option, which keeps the terminal window open after the command has finished executing. The -e option is used to specify the command to be executed. We are also redirecting the output of the command to a file called output.txt using the ">" operator.
Once we have created the script, we can schedule it to run periodically using cron.
Scheduling the Script using Cron
To schedule the script, we need to edit the crontab file. The crontab file contains a list of commands to be run at specified intervals.
# Edit the crontab file
crontab -e
Once the crontab file is open, we can add a new line to schedule the script. The format of the line is as follows:
* * * * * command-to-be-executed
The five asterisks represent the time interval at which the command will be executed.
For example, to run the script every hour, we can add the following line to the crontab file:
0 * * * * /path/to/script.sh
In the above example, we are running the script.sh file located at /path/to/ every hour.
In this article, we have learned how to display the output of an xterm command terminal screen using cron. This is a useful technique for scheduling tasks and running scripts automatically in a Unix-like operating system.