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check your $3 is getting assigned correctly or not..
just do echo $3 and check..

And it wont change your original file content...

for changing original file.. do .

awk -v x="$3" '$0 !~ x'...

Try this then (could not test my previous code 'cause I was on my smartphone)awk '!($0~x)' x="$3" file

Linux and UNIX don't care about the filename at all. They check the first few bytes in the file to see what it is.

All the top line does is tell the OS what shell to use.

If you want to use...

You can call your script name anything you like. Ie bla.bla xx ....

Typically the first line in the scirpt is the shabang command, this dictates
what shell you are using.. For the most...

The "=" version is setting the permissions regardless of any previous permisssions. The "+" version is adding permissions to existing permisisons.
As the permissions in your example are "rwx" the...

Hi austing5,

maybe visualizing the structure of the directories may clarify the concept:


/ <-- this is the 'root' directory of linux/unix filesystem
|
+-- home ...

/home/unix/jones

unix is the parent directory of jones
home is the parent directory of unix
the root directory is the parent directory of home

you were almost right, if you haven't got it by now try the following:


ls -a *.txt


the -a shows hidden file as well, and the * is a wild card means anything.

so *.txt is anything that...