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You can try this way
# Get parameters from command line
while getopts "b:r:w:f" opt; do
case "$opt" in
b)
BankName=${OPTARG}
;;&
r)
Region=${OPTARG}
...

The following should give you what you want even if the filename contains white-space characters:
printf '%s\n' "$f" | awk -F'[-_]' '{print substr($0, 1, length($1$2$3$4$5)+4)}'
Note that echo on...

Then it should work:$ f=010020001_S-FOR-Sort-SYEXC_20180109_062320_0100.x937
$ echo "${f%_*_*_*}"
010020001_S-FOR-Sort-SYEXC
$ echo "${f%[-_]*[-_]*[-_]*}"
010020001_S-FOR-Sort-SYEXC
$ echo...

Try also shell parameter expansion
echo ${f%[-_]${f#*[_-]*[-_]*[_-]*[_-]*[_-]*}}
010020001_S-FOR-Sort-SYEXC

Hello gnnsprapa,

Apologies, in hurry I missed it. Please try following and let me know if this helps you.

awk 'END{split(FILENAME, array,"_");print array[1] "_" array[2]}'...

The question RudiC presented was not about your requirements, but about what operating system you're using (which you have yet to answer) and what shell you're using (which you have answered). He...

$ find sourcedir/ -type f -exec mv -v {} destdir \; > move.log

This command find all the files(type -f) in sourcedir and move it to destdir.

sourcedir - Directory which contains all...