Editing/Replacing content in multiple files in Unix AIX without opening it

Question

I have multiple files in Unix directory. files names are as below.
EnvName.Fullbkp.schema_121212_1212_Part1.expd EnvName.Fullbkp.schema_121212_1212_Part2.expd

Answer 1

It's some kind of extreme optimist who suggests sed -i on AIX.

It's a bit more likely that perl will be installed.

perl -pi -e 's/10022012_0630/22052013_1000/' EnvName.Fullbkp.schema_121212_1212_Part*.expd

If no perl, then you'll just have to do it like a Real Man:

for i in EnvName.Fullbkp.schema_121212_1212_Part*.expd
do
  ed -s "$i" <<'__EOF'
1,$s/10022012_0630/22052013_1000/g
wq
__EOF
done

Have some backups ready before trying these.