Watch can help you monitor the results of a command and save you from manually running it over and over again. Under Linux, watch is the periodic execution of the next program, and full-screen display of the execution results. You can use him to monitor everything you want. The result of the command changes, such as tail a log file, LS monitors the size of a file change.
Command format
Watch [Options] Command
Parameter explanation:
Options: Option-N or--interval watch defaults to run the program every 2 seconds, you can use-N or-interval to specify the time interval. -D or--differences use the-D or--differences option Watch to highlight the changed area. The-d=cumulative option highlights the changes that have been made (regardless of the recent change). The-T or-no-title will turn off the watch command at the top of the interval, command, output of the current time. -H,--help view the Help document Command:shell commands (such as LS pwd these)
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The Watch for Linux commands