Shell Programming and Scripting

I would advice you to read something about ksh and csh, they are the shell interpreters in unix... and you are typing your commands in csh..

to solve your problem for now, create a file with the following two lines :

#!/usr/bin/ksh

egrep "$(<file2)" file1


and save it with any name you wish... give it executable permissions and run it.

try man ksh and man csh for more info...

Hi,

I tried what you have suggested and get the following:
% cat file1
item4
item5
% cat file2
item2
item3
item5
item6
% testscript
item5
% cat file1
item4
item5

but the contents in file1 is still the same.

I need the script to change the contents in file1 but it seems like file1 was not modified at all after I run the script.

now what you need to do is redirect the output of ur script to a temporary file and then move this file to your file1.

#!/usr/bin/ksh

egrep "$(<file2)" file1 > File3

mv -f file3 file1


use this .

You can also use the grep command :

grep -f file2 file1 > fil3

If file2 lines are not Regular Expressions :

grep -F -f file2 file1 > file3.


If file1 contains :

item2
item5
item5-b

The result will be (with grep and egrep) :

item5
item5-b


If your two files are sorted, you can use the join command :

join file1 file2 > file3


Jean-Pierre.

Hi all,

Thanks!. I used:
#!/usr/bin/ksh
egrep "$(<file2)" file1 > File3
mv -f file3 file1

and it works. However, when I tried to put into file1 and file2 irrrgular names, like "filenotinfilelist1234.567.89" or "filenotinfilelist11.11.11", then these files still remain in file1.

I tried to use the command from Jean-Pierre but I got this error message:
% testscript
grep: illegal option -- F
Usage: grep -hblcnsviw pattern file . . .

On my AIX Box, grep -F works like fgrep, so try

fgrep -f file2 file1 > file3