You got it right - almost - but missed by a hairs width.
Any command (like "s", etc.) can be preceeded by a range clause. A range clause can be either a range of lines, determined by line numbers or a starting/ending regexp, or it can be a single line number or regexp. In the second case the command would either apply to the single line number or to all lines matching the regexp:
The first line would apply "s/x/y/" only to lines 1-3, the second line would apply it to all lines from a line starting with "aa" to a line starting with "bb".
The third line would apply the command only to line number 1 and the fourth to all lines starting with "abc".
This you did correctly, but range clauses cannot be nested, and
is also a range clause: one, that applies the command "d" only to lines of the form "/^$/", like in my fourth example. To correct your code you simply have to correctly nest the commands:
or, in short form:
I hope this helps.
bakunin
All of the sed documentation I've seen says that the "{" command format is:
Quote:
[2addr] {function
function
. . .
}
The use you're showing here should be documented as:
[QUOTE][2addr] {command
command
. . .
}[/QOTE]
because "function" doesn't include an address. I wonder if this is something that all implementation of sed do (but never documented) {and should be included in a future version of the POSIX and UNIX standards}, or if it is only provided by some implementations of sed?
Last edited by Don Cragun; 08-05-2012 at 08:42 AM..
Hi,
I have a log file which shows the files which has been changed over the last week.
They follow this pattern:
old_file_version_number@@new_file_version_number
Now I need to know how to delete from each line parts starting from @@.
I would be issuing the command inside vi(m).
So... (5 Replies)
Hi,
I have file 1.txt with following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433
**
**
**
In file 2.txt I have the following entries as shown:
0152364|134444|10.20.30.40|015236433
0233654|122555|10.20.30.50|023365433... (4 Replies)
trying to use sed in finding a matching pattern in a file then deleting
the next line only .. pattern --> <ad-content>
I tried this but it results are not what I wish
sed '/<ad-content>/{N;d;}' akv.xml > akv5.xml
ex,
<Celebrant2First>Mickey</Celebrant2First>
<ad-content>
Minnie... (2 Replies)
All,
I have the following file:
--------------------------------------
#
# /etc/pam.d/common-password - password-related modules common to all services
#
# This file is included from other service-specific PAM config files,
# and should contain a list of modules that define the services... (2 Replies)
Hi guys,
got a problem here with sed on the command line.
If i have a string as below:
online xx:wer:xcv: sdf:/asdf/http:https-asdfd
How can i match the pattern "http:" and replace the start of the string to the pattern with null?
I tried the following but it doesn't work:
... (3 Replies)
I couldn't figure out how to use sed or any other shell to do the following. Can anyone help? Thanks.
If seeing a string (e.g., TODAY) in the line,
replace a string in the line above (e.g, replace "Raining" with "Sunny")
and replace a string in the line below (e.g., replace "Reading" with... (7 Replies)
Can someone please assist me, I'm trying to get vi to remove all the occurences of the text in a file i.e. "DEVICE=/dev/mt??". The "??" represents a number variable. Is there a globel search and delete command that I can use?
Thank You in Advance. (3 Replies)
Hi I just wanted to add a new line after every matching pattern:
The method doing this doesn't matter, however, I have been using sed and this is what I tried doing, knowing that I am a bit off:
sed 'Wf a\'/n'/g'
Basically, I want to add a new line after occurrence of Wf. After the line Wf... (5 Replies)
Dear Unix Forums,
I am hoping you can help me with a pattern matching problem.
What am I trying to do?
I want to replace multiple lines of a text file (that match a multi-line pattern) with a single line of text. These patterns can span several lines and do not always have the same number of... (10 Replies)
'Hi
I'm using the following code to extract the lines(and redirect them to a txt file) after the pattern match. But the output is inclusive of the line with pattern match.
Which option is to be used to exclude the line containing the pattern?
sed -n '/Conn.*User/,$p' > consumers.txt (11 Replies)