26 нояб. 2016 г. · A portable (dash,bash,ksh, etc) script containing a function: #!/bin/sh contains() { if [ "$1" ] && # Is there a source string. [ "$2" ] && # Is there

21 дек. 2020 г. · To answer the general question of how to check if a string contains another one in sh, best is with the case construct which is how you do pattern matching in ...

13 июн. 2017 г. · The Largest Prefix Pattern will be the whole string if the variable subpattern ( $testseq ) value is contained inside the $file value.

23 янв. 2021 г. · Since you are using BusyBox (ash shell), the problem seems to be that your script uses a construct not recognized by the shell ( [[...]] ).

17 июл. 2019 г. · Try as if grep -q "$STRING" "$FILE" ; then echo 'the string exists' ; else echo 'the string does not exist' ; fi Since export is missing on line number 12 of ...

29 мая 2014 г. · You can do case-insensitive substring matching natively in bash using the regex operator =~ if you set the nocasematch shell option.

24 февр. 2021 г. · A string to be written to standard output. If the first operand is -n , or if any of the operands contain a <backslash> character, the results ...

5 июн. 2020 г. · Use a case statement to match the string against wildcard patterns: they're less powerful than regex, but sufficient here.

21 февр. 2024 г. · In a Bourne/POSIX shell, there's no built-in way to do a substring check using conditionals ( [ ... ] ), but there is one using a case statement.

19 нояб. 2019 г. · Make sure a string contains at least one uppercase letter, one lowercase letter, one number and one punctuation character.