Hi,

It seems that I can only reduce the priority or increase the nice
value as a nonroot. For certain applications, I want to decrease its
priority for a period of time and later increase its priority to the
original one. I'm wondering if there is any way to do this?

Thanks,
Peng

Hi All,

I want to excute a series of commands by pipes.
cmd1 | cmd2 | ... | cmdn

To be safe, the exit status of each command should be check to ensure
whether the command is successful.

So, is there some easy way to do this?

Best Regards,
PRC
Jul 15, 2008

* Version 7 Unix

http://freedownloadablebooks.blogspot.com/2008/03/version-7-unix.html
Single UNIX Specification
http://freedownloadablebooks.blogspot.com/2008/03/single-unix-specification.html
Pipeline (software)
http...

Dear all:

I have a question on how to copy file in a unix server to an
instrument which has a cpu and hard disk. For example, I have an
account in a remote Unix server, and I can ssh to that server which
will ask...

I have a file that I need to fix with many entries that look like
this:

NEW (nu) 0 ( 429186 275982 ) via2$column_2

bu need to look like this depend whats on the first 4 characters of
the last field:

NEW MET2 0 ( 429186 275982 ) via2$column_2

Heres are the details:

NEW MET2 0 ( 429186 275982 ) via2$column_2
^^^ ^^^^^^
A B

The value of A will change depending whats on the first 4
characters of B

heres a few examples:
if B is via1 then (nu) will need to be changed to MET1
if B is via3$row_2 then (nu) will need to be changed to MET3

Hope this makes sense. Is there a one-liner for this type of
substitution?

THANKS

hi all,
how can i do to get double grep?
for example(in bash shell)

more filename | grep "hello" or grep "world"

?

thanks