I need to compare 2 strings of the following formatting:
2013-12-31T00:00:00 2014-11-19T15:40:30 Its a custom datetime format. I tried different things, none worked:
if [ ${val1} < ${val2} ] || [ ${val1} == ${val2} ]; then ... or
if [ ${val1} <= ${val2} ] or
if [[ ${val1} -el ${val2} ]] Thanks guys!
1 Answer
Bash has its own testing syntax, where you can use > and <:
$ val1=2013-12-31T00:00:00 $ val2=2014-11-19T15:40:30 $ [[ $val1 > $val2 ]] $ echo $? 1 $ [[ $val1 < $val2 ]] $ echo $? 0 Alternatively you can use Unix timestamps and compare the integer values:
$ val1=$(date --date='2013-12-31T00:00:00' +%s) $ val2=$(date --date='2014-11-19T15:40:30' +%s) $ [ $val1 -gt $val2 ] $ echo $? 1 $ [ $val1 -lt $val2 ] $ echo $? 0 
