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Hi.

You need double quotes around the sed, otherwise the shell won't expand $i.

Also, after deleting each field, you need to subtract 1 from other field numbers (what was field 2, after...

a="a1;b1;c1;d11;e1"; echo $1 | sed 's/[a-z0-9]*;/;/4'

echo 'a1;b2;c33;d4;e5' | nawk -F';' '{$4=""}1' OFS=';'
OR
echo 'a1;b2;c33;d4;e5' | sed 's/[^;][^;]*;/;/4'

awk '!/^[^:]+:[UCD]/ {print; next} {$0=$1} /U$/ {a="pdate"} /C$/ {a="reate"} /D$/ {a="elete"} {print $0a}'

---------- Post updated at 01:42 PM ---------- Previous update was at 01:21 PM ----------...

A tweaked version of jim's awk:
awk '{$0=$1} /U$/ {a="pdate"} /C$/ {a="reate"} /D$/ {a="elete"} {print $0a}'

Regards,
Alister

grep record *.txt | sort -r |
awk '/U$/ {a="pdate"} /C$/ {a="reate"} /D$/ {a="elete"} {$0s= $0 a; print}'