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2025-09-25 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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In the course of actual operation, we often encounter repeated execution of the same command to observe the change of the result. In the past, it was often the way of the arrow and arrow keys plus enter, or Ctr+p and then enter.
Watch-execute a program periodically, showing output fullscreen
SYNOPSIS
Watch [- dhvt] [- n] [--differences [= cumulative]] [--help]
[--interval=] [--no-title] [--version]
Watch repeatedly executes a command to display the result on full screen. This allows you to monitor program output over time, with a default interval of two seconds, using parameters
-n or-interval can specify the time interval.
-d highlight the place where the transition was successful
-t does not display the title title
The commands used in comparison are as follows:
Watch-n 3-d free / / monitors memory usage
Watch-n 1 "df-I" DF "/ / Monitoring the number of disks inode and block
Watch-n 60 from / / Monitoring mail
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