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

Assuming you mean you don't want to manually open the files:

sed -i 's/10022012_0630/22052013_1000/' filename*.log

---

update: since the "-i" switch is not available on AIX, but assuming you have ksh (or a compatible shell):

mkdir modified
for file in filename*.log; do
    sed 's/10022012_0630/22052013_1000/' "$file" > modified/"$file"
done

Now the modified files will be in the modified directory.