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Script to remove line of text

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# 1  
Old 04-17-2012
Script to remove line of text
Hello,
I have a line that needs to be removed using sed -i to perform the replace in place. The issue that I have is the files on each server may contain extra rows after the last logger definition. So I can't count accurately from the last row.
So from the example the line that contains @watchdog could have 5 blank lines under it or 3.

TEXT:
Code:
# Save boot messages also to boot.log
local7.*                                                /var/log/boot.log

local1.*                                                /var/log/prod/prod.log
local1.*                                                @sysmon
local1.*                                                @watchdog

DESIRED RESULTS:
Code:
# Save boot messages also to boot.log
local7.*                                                /var/log/boot.log

local1.*                                                /var/log/prod/prod.log
local1.*                                                @watchdog

The line that contained @sysmon is gone in the desired results.

Thanks,
jaysunn
# 2  
Old 04-17-2012
So do you want to simply eliminate the "@sysmon" line...in place that is
# 3  
Old 04-17-2012
More details please. What criteria is used to decide which row is to be deleted? You've told us what criteria to not use...
# 4  
Old 04-17-2012
How about simply deleting all blank lines...and not worrying about only those that are at the tail end.
# 5  
Old 04-17-2012
Hi,
try

Quote:
sed -i '/^$/d' yourfile.txt
# 6  
Old 04-17-2012
Thanks for helping!!
@shamrock,
Yes I just want to remove the line that contains "@sysmon".

I am sorry for wasting every ones time. After thinking about "More Criteria" that @Corona688 suggested. I think I can get away just fine with the following code below, since the row containing @sysmon is always the same. It may be at a different line number in the file, but the same. Also I am sure much more elegant solutions exist.

Code:
[root@server ~]# sed 's/local1.*                                                @sysmon//' /etc/syslog.conf

The command above does remove the line that I wanted removed.
Thanks for helping me think on my own. Smilie
jaysunn
# 7  
Old 04-17-2012
You can try this ex script for in place substitution...
Code:
ex -s +'/@sysmon$/d | wq' file
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