cat and grep redirection

10/12/2006, 07h18

Hi,
I am trying to do something in my script as follows, it sends the
following output to the file hosts as follows:

mgt=b01
cat >> ./hosts <<EOF
#
#
10.32.25.34 b01
10.32.25.35 b02
10.32.25.36 b03
EOF

I want to cat the output to the hosts file but 'exclude' the line if
the line has the value of the 'mgt' variable so in the above example I
would get in the hosts file.

#
#
10.32.25.35 b02
10.32.25.36 b03

I have tried using cat with grep -v "$mgt" with no luck. I think Im
redirecting something wrong. Thanks for any .

10/12/2006, 07h34

cconnell_1@lycos.com wrote:

> mgt=b01
> cat >> ./hosts <<EOF
> #
> #
> 10.32.25.34 b01
> 10.32.25.35 b02
> 10.32.25.36 b03
> EOF
>
> [...]
>
> I have tried using cat with grep -v "$mgt" with no luck.

This works for me:

#v+

mgt=b01
grep -v "$mgt" <<EOF >>./hosts
#
#
10.32.25.34 b01
10.32.25.35 b02
10.32.25.36 b03
EOF

#v-

Cheers,

--
Klaus Alexander Seistrup
http://klaus.seistrup.dk/

10/12/2006, 07h42

cconnell_1@lycos.com wrote:
> Hi,
> I am trying to do something in my script as follows, it sends the
> following output to the file hosts as follows:
>
> mgt=b01
> cat >> ./hosts <<EOF
> #
> #
> 10.32.25.34 b01
> 10.32.25.35 b02
> 10.32.25.36 b03
> EOF
>
> I want to cat the output to the hosts file but 'exclude' the line if
> the line has the value of the 'mgt' variable so in the above example I
> would get in the hosts file.
>
> #
> #
> 10.32.25.35 b02
> 10.32.25.36 b03
>
>
> I have tried using cat with grep -v "$mgt" with no luck. I think Im
> redirecting something wrong. Thanks for any .

It works for me:

mgt=b01
cat << EOF | grep -v "$mgt" > roland.txt
#
#
10.32.25.34 b01
10.32.25.35 b02
10.32.25.36 b03
EOF

cat roland.txt

10/12/2006, 07h18	#1
cconnell_1@lycos.com Messages: n/a Hébergeur:	cat and grep redirection Hi, I am trying to do something in my script as follows, it sends the following output to the file hosts as follows: mgt=b01 cat >> ./hosts <<EOF # # 10.32.25.34 b01 10.32.25.35 b02 10.32.25.36 b03 EOF I want to cat the output to the hosts file but 'exclude' the line if the line has the value of the 'mgt' variable so in the above example I would get in the hosts file. # # 10.32.25.35 b02 10.32.25.36 b03 I have tried using cat with grep -v "$mgt" with no luck. I think Im redirecting something wrong. Thanks for any .

10/12/2006, 07h34	#2
Klaus Alexander Seistrup Messages: n/a Hébergeur:	Re: cat and grep redirection cconnell_1@lycos.com wrote: > mgt=b01 > cat >> ./hosts <<EOF > # > # > 10.32.25.34 b01 > 10.32.25.35 b02 > 10.32.25.36 b03 > EOF > > [...] > > I have tried using cat with grep -v "$mgt" with no luck. This works for me: #v+ mgt=b01 grep -v "$mgt" <<EOF >>./hosts # # 10.32.25.34 b01 10.32.25.35 b02 10.32.25.36 b03 EOF #v- Cheers, -- Klaus Alexander Seistrup http://klaus.seistrup.dk/

10/12/2006, 07h42	#3
RolandRB Messages: n/a Hébergeur:	Re: cat and grep redirection cconnell_1@lycos.com wrote: > Hi, > I am trying to do something in my script as follows, it sends the > following output to the file hosts as follows: > > mgt=b01 > cat >> ./hosts <<EOF > # > # > 10.32.25.34 b01 > 10.32.25.35 b02 > 10.32.25.36 b03 > EOF > > I want to cat the output to the hosts file but 'exclude' the line if > the line has the value of the 'mgt' variable so in the above example I > would get in the hosts file. > > # > # > 10.32.25.35 b02 > 10.32.25.36 b03 > > > I have tried using cat with grep -v "$mgt" with no luck. I think Im > redirecting something wrong. Thanks for any . It works for me: mgt=b01 cat << EOF \| grep -v "$mgt" > roland.txt # # 10.32.25.34 b01 10.32.25.35 b02 10.32.25.36 b03 EOF cat roland.txt

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