Question

I need to verify if the second word from $line_from_file is a string with lowercase or uppercase characters

(WORD – string can be with numbers)

How to match WORD string? (I use this syntax in ksh script)

    [[  ` echo $line_from_file | awk '{print $2}' ` =   WORD    ]] && print "MATCH"

WORD – can be small or capital characters with numbers (but not only numbers)

for example

WORD=textBIG

WORD=HOME_DIR

WORD=COMPUTER1

WORD=HOST_machine

Lidia

Answer 1

$ shopt -s extglob
$ s="abCD123"
$ case "$s" in +([0-9]) ) echo "not match" ;;+([-a-zA-Z0-9_]) ) echo "match";; esac
match
$ s="12345"
$ case "$s" in +([0-9]) ) echo "not match" ;;+([-a-zA-Z0-9_]) ) echo "match";; esac
not match
$ s="a12345-asf"
$ case "$s" in +([0-9]) ) echo "not match" ;;+([-a-zA-Z0-9_]) ) echo "match";; esac
match