gnu grep "feature"....

[ogniemi]

there are -A and -B switches for gnugrep. I am using AIX grep which doesn't support it, so my question is what is the best replacement for it? awk?

how to get n lines starting from matched line or n lines before the matched line using awk?

1. including matched line
2. not including the matched line

regards, m.

 

[ericbrunson]

Here's a little trick:

s2(~)$ diff -C 3 <( grep -v brunson /etc/passwd ) /etc/passwd  | grep -v -e '^\*' -e '^-'
  squid:x:23:23::/var/spool/squid:/dev/null
  webalizer:x:67:67:Webalizer:/var/[URL unfurl="true"]www/usage:/sbin/nologin[/URL]
  john:x:500:500::/home/john:/bin/bash
+ brunson:x:501:501::/home/brunson:/bin/bash
  peg:x:502:502::/home/peg:/bin/bash
  jboss:x:503:503::/home/jboss:/bin/bash
  mysql:x:504:504::/home/mysql:/bin/bash