Logical OR

[Lars Noodén [e-mail] [sed-users]]

How do I refine the following so that the p cannot be triggered twice
even if both conditions are met in the same line?

netstat -ntlp | sed -n -e '1,2p;/sshd/p'

Or is there a more efficient formula which can be used?

I'm aiming for the sed equivalent of an awk statement:

netstat -ntlp | awk '/sshd/ || NR<=2'

Regards,
Lars

[Scott Walters [e-mail] [sed-users]]

hi,
try this.
netstat -ntlp | sed -n -e '1,2{p; d;}; /sshd/p'

it will definitely print the first 2 lines, and later will print lines only which have /sshd/ as a pattern in them.
tys 

On Saturday, January 7, 2017 2:24 PM, "Lars Noodén ***@gmail.com [sed-users]" <sed-***@yahoogroups.com> wrote:


  How do I refine the following so that the p cannot be triggered twice
even if both conditions are met in the same line?

netstat -ntlp | sed -n -e '1,2p;/sshd/p'

Or is there a more efficient formula which can be used?

I'm aiming for the sed equivalent of an awk statement:

netstat -ntlp | awk '/sshd/ || NR<=2'

Regards,
Lars
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[Lars Noodén [e-mail] [sed-users]]

hi, try this.
netstat -ntlp | sed -n -e '1,2{p; d;}; /sshd/p'
it will definitely print the first 2 lines, and later will print
lines only which have /sshd/ as a pattern in them. tys

Thanks.

/Lars

[Jim Hill [e-mail] [sed-users]]

As an alternative, `sed '1,2b;/sshd/b;d'`

[Scott Walters [e-mail] [sed-users]]

further.
`sed '1,2b; /sshd/!d'`



On Saturday, January 7, 2017 9:33 PM, "Jim Hill ***@gmail.com [sed-users]" <sed-***@yahoogroups.com> wrote:


  As an alternative, `sed '1,2b;/sshd/b;d'`
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[[e-mail] [sed-users]]

netstat ... | sed -e '1,2{/TCP/\!b;}' -e '//\!d'





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