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Sure this is a simple one – still learning my way around sh scripts. I’ve got:-
if [ $3 < 480 ]; then
blah blah command
else
blah blah command2
fi
$3 is a passed variable, again an integer. However, when this script is run, it reports:-
line 20: 480: No such file or directory
Confused.
Please use
[ "$3" -lt 480 ]or it will be treated as input redirection inside the brackets. That’s why you got the error:480: No such file or directory.To review the available alternatives:
[ "$3" -lt 480 ]— numeric comparison, compatible with all POSIX shells[ "$3" \< 480 ]— string comparison (generally wrong for numbers!), compatible with all POSIX shells[[ $3 < 480 ]]— string comparison (generally wrong for numbers!), bash and ksh only(( $3 < 480 ))— numeric comparison, bash and ksh only(( var < 480 ))— numeric comparison, bash and ksh only, where$varis a variable containing a numbercheck http://www.gnu.org/software/bash/manual/bashref.html#Bash-Conditional-Expressions to know more information.