watch [options] command
Usage:
watch [options] command
Options:
-b, --beep beep if command has a non-zero exit
-c, --color interpret ANSI color and style sequences
-d, --differences[=<permanent>]
highlight changes between updates
-e, --errexit exit if command has a non-zero exit
-g, --chgexit exit when output from command changes
-n, --interval <secs> seconds to wait between updates
-p, --precise attempt run command in precise intervals
-t, --no-title turn off header
-x, --exec pass command to exec instead of "sh -c"
-h, --help display this help and exit
-v, --version output version information and exit
For more details see watch(1)
Watch every 1 second the ‘free -h’ command
watch -n1 free -h
Every 1,0s: free -h lo: Wed Mar 11 10:15:33 2020
total used free shared buff/cache available
Mem: 31Gi 7,0Gi 7,9Gi 383Mi 16Gi 23Gi
Swap: 4,0Gi 0B 4,0Gi