To view or display a logfile in real time on a Linux system, you can use the tail command with the -f option.
The tail command is a utility that displays the last part of a file. The -f option tells tail to keep the file open and continuously display new lines as they are added to the file.
For example, to view the /var/log/syslog logfile in real time, you can use the following command:
tail -f /var/log/syslog
This will display the last part of the /var/log/syslog logfile and continuously display new lines as they are added to the file.
To stop viewing the logfile, press the Ctrl + c keys.
You can find more information about the tail command and its options in the Linux documentation or by running the tail --help command.
Keep in mind that the tail command may not work with all types of logfiles, depending on the way they are written to the file. Some logfiles may use log rotation or other techniques that prevent the tail command from displaying new lines as they are added to the file.
In these cases, you may need to use a different utility or approach to view the logfile in real time. You can find more information about these techniques and utilities by searching online or in the Linux documentation.