7 мар. 2018 г. · There is no shell operator -o, you seem to be looking for if [[ $file == 'Metro'[0-9]* || $file == 'Store'[0-9]* ]]; then echo "$file" fi.

4 апр. 2013 г. · Use this syntax in bash: if [ "a string" = "another one" ] ; then # Whatever fi. For multiple conditional statements such as OR, use:

14 дек. 2014 г. · The expression $(command) is a modern synonym for `command` which stands for command substitution; it means run command and put its output here.

8 апр. 2018 г. · I need a script which takes the first argument, checks which letter it is and does the job. If the letter is a,b,c or d it exits, otherwise rights something.

4 июн. 2019 г. · You don't need a regex operator to do an alternate match. The [[ extended test operator allows extended pattern matching options using which ...

8 дек. 2013 г. · = and == are for string comparisons. -eq is for numeric comparisons. -eq is in the same family as -lt, -le, -gt, -ge, and -ne.

6 авг. 2010 г. · [[ is bash's improvement to the [ command. It has several enhancements that make it a better choice if you write scripts that target bash.

19 окт. 2015 г. · I think you want: if [[ ! -z "$OLD_VERSION" && "$OLD_VERSION" =~ "$PATTERN" ]]; then echo Matched else echo No match fi.

24 апр. 2013 г. · I'm trying to write a script that will check two error flags, and in case one flag (or both) are changed it'll echo-- error happened.

14 июл. 2020 г. · In general, don't mix || and && . The precedence is not what you expect. a || b && c is equivalent to (a || b) && c , but a && b || c is not ...