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Describe a bit more in detail what you want to do, thanks.

Is this classroom stuff / homework?
What have you tried so far?
Why vi?

Try:

paste -d" " file1 file2

you could use a macro if your version of vi supports them - i've been using vim so long I can no longer remember what the original vi can do.

the macro could be:

$F_d$j

$ - go to end of line...

:,%s/_[^_]*$//

If you don't have root, you can try to newgrp in your .profile or .login or .whatever

Always use "usermod" (or whatever command is applicable to your O/S) rather than editing /etc/passwd.

forth (4) field :separated ...
The next after after your UID

Only alternative is if you are not root, to ask your admin... (change GID in /etc/passwd file...)

well that's mostly because there's not much viruses for *nix ;)
but we all know rootkit for example
and if you will take some executable file from inet and execute it on *nix it can do everything...

In unix/linux system, normally we don't install Anti-virus software,but on Windows, the first software you need think to install is anti-virus software.

the problem with windows security is that :

there is ALWAYS a backdoor to IT .
there is NO windows server/pc called secured if its not
1) running an antivirus (a)
2)running behind a unix...

It's worth noting, though, that it's possible to configure any operating system to be insecure. UNIX possesses features that allow a competent admin to button it closed very tightly but that doesn't...

Advantages of Unix

- Unix is more flexible and can be installed on many different types of machines, including main-frame computers, supercomputers and micro-computers.

- Unix is more stable...

Hi,
I need to know why is Unix considered as more secure as compared to Windows. Following points are known but the reason is not known:
i. File access permissions can be provided user wise in...

awk -F',' 'OFS="," {if ($6=="403") {print $1,$3,$10,$11,$12}}' data.file

probably using the key combo ESC-p

i.e. type in start of line then hit ESC and p together.

try a "man tcsh" and read the section on history searching.

:-)

In vi, use
:set list
and you can do
:set nolist
to get back to normal.