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Use loop in sed or awk?

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Top Forums Shell Programming and Scripting Use loop in sed or awk?
# 1  
Old 10-23-2008
Use loop in sed or awk?
I know a little bit of sed and awk, but not too much. can loop be done in sed.
Baiscally what I want is:
file1:
aaa 111
bbb 222
ccc 333
ddd 444
eee 555
fff 666
Note: the space in between is "tab"
file2:
bbb
ddd
eee
I want delete any entries in file1 which starts with entries in file2. The output I want is:
aaa 111
ccc 333
fff 666
I wrote a script by using "read" command, it works but all the "tab"s replaced by space.
I'm looking for the solution of sed or awk. but don't know how to use loop inside sed. Or any better way to achieve this. Please help.
Thanks...
# 2  
Old 10-23-2008
Code:
grep -v -f file2  file1

# 3  
Old 10-23-2008
Oh. Silly me! I have been using grep for such a long time but never known -f option.
Just tried it on solairs box. Figured -f is only valid for /usr/xpg4/bin/grep, but not /usr/bin/grep. Do you know the different of these two "grep"?

Many THX!
# 4  
Old 10-23-2008
You are on Solaris. XPG4 was an early standards attempt for all of UNIX -- at what POSIX is supposed to do now.

Don't use old awk or any other oldies.
# 5  
Old 10-23-2008
you're the man!
That's why I like UNIX. There are always something new for me.
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