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public text v1 · immutable$ a=SAMBA
$ $"$a"_STATE=RUNNING
$SAMBA_STATE=RUNNING: not found
$ echo $SAMBA_STATE
$ eval "$a"_STATE=RUNNING
$ echo $SAMBA_STATE
RUNNING
$ $ a=SAMBA
$ $"$a"_STATE=RUNNING
$SAMBA_STATE=RUNNING: not found
$ echo $SAMBA_STATE
$ eval "$a"_STATE=RUNNING
$ echo $SAMBA_STATE
RUNNING
$