unix/ssh question
 

it is possible from command line to delete lines from a file?
for example delete all lines (like "wordxxx) from the files in the directory /var/
i want to delete only these lines from files.. not the entire files
if yes, how do i do that?

You could also do something like:

cat yourfile.txt | grep -v "stuff you dont want" > newfile.txt

Your mileage may vary.