10-04-2007
sed question
Hi, can anyone explain step by step what this line of sed code is trying to do. Thanks.
Sed -e "s/big \(.*\) dog/small \1 cat/" filename
Last edited by NycUnxer; 10-04-2007 at 01:04 PM..
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
Is there any way to traverse the file once and look for the following conditions in one sweep instead of going over the file 3 times with different search criteria......
sed -n '/^ORA-07445/ p' /tmp/t$$ > ${OERRFILE}
sed -n '/^ORA-00600/ p' /tmp/t$$ >> ${OERRFILE}
... (1 Reply)
Discussion started by: YS2002
1 Replies
2. Shell Programming and Scripting
hello there, I have a sed question.
I have a file (temp.srv), in it it has
v1_host1
v2_host2
And I have another file (temp2.srv), in it is has
v1_host3_date
v1_host1
v2_host2
v2_host4_date
v3_host5_date
I had used a script to remove the name from temp2.srv base on the name inside... (3 Replies)
Discussion started by: ahtat99
3 Replies
3. Shell Programming and Scripting
Hi,
When deleting lines using sed, as i understand the lines are redirected to the standard output. What i'm unclear about is how to actually modify the file?
If I write the command sed '1,2d' test it will display lines one and 2 onto the screen however the file is not modified? I think my... (5 Replies)
Discussion started by: c19h28O2
5 Replies
4. Shell Programming and Scripting
Hi, :)
can any body explain the following statement
sed 's/\(\)- ]//g'
cheers
RRK (3 Replies)
Discussion started by: ravi raj kumar
3 Replies
5. Shell Programming and Scripting
I have a file that conatins following info
Policy1=U|guestRoom=test1idCode=5(1):!:Amenity2=U|RoomId=testrma=4(1):!:|
GuestRoomAmenity1=U|guestRoomId=testguest1id^rmaCode=5(1):!:|
I need it to look like this
Policy1=U|guestRoom=test1idCode
Amenity2=U|RoomId=testrmaCode... (2 Replies)
Discussion started by: arushunter
2 Replies
6. UNIX for Dummies Questions & Answers
How would I use sed to print everything on the line after the regular expresion?
I have a configuration file setting several variables.
cfg.dat
DDB = cpptest
SUDBNAME = sucpptestdb
host = cpptest
Example
I want to search for the regular expresion 'SUDBNAME =' and print everything on... (3 Replies)
Discussion started by: orahi001
3 Replies
7. Shell Programming and Scripting
Write a sed script to extract the year, rank, and stock for the most recent 10 years available in the file top10_mktval.csv, and output in the following format:
------------------------------
YEAR |RANK| STOCK
------------------------------
2007 | 1 | Exxon... (1 Reply)
Discussion started by: beibeiatNY
1 Replies
8. Shell Programming and Scripting
hi
i have a file with this line:
variable=/export/home/oracle
I want to change the file so that the path is replaced with the value of another variable
var2=/tmp/anything.
how to do this in sed?
thx (4 Replies)
Discussion started by: melanie_pfefer
4 Replies
9. Shell Programming and Scripting
I need to replace the numbers with a new string.
How can I give a wildcard for the different # of numbers
sed '/abcdef/s/abcdef=*/abcdef=999999/'<foo>foo1
From: To:
abcdef=1234 abcdef=999999
abcdef=12345 abcdef=999999
abcdef=123456... (10 Replies)
Discussion started by: beppler
10 Replies
10. UNIX for Dummies Questions & Answers
I am trying to write a script that will take an input text file in the format
person: place: phonenumber;
person: place: phonenumber;
person: place: phonenumber;
...
and output it using sed too:
Name ######## Location ######### Phone Number... (1 Reply)
Discussion started by: jmack56
1 Replies
LEARN ABOUT X11R4
pcresample
PCRESAMPLE(3) Library Functions Manual PCRESAMPLE(3)
NAME
PCRE - Perl-compatible regular expressions
PCRE SAMPLE PROGRAM
A simple, complete demonstration program, to get you started with using PCRE, is supplied in the file pcredemo.c in the PCRE distribution.
The program compiles the regular expression that is its first argument, and matches it against the subject string in its second argument.
No PCRE options are set, and default character tables are used. If matching succeeds, the program outputs the portion of the subject that
matched, together with the contents of any captured substrings.
If the -g option is given on the command line, the program then goes on to check for further matches of the same regular expression in the
same subject string. The logic is a little bit tricky because of the possibility of matching an empty string. Comments in the code explain
what is going on.
If PCRE is installed in the standard include and library directories for your system, you should be able to compile the demonstration pro-
gram using this command:
gcc -o pcredemo pcredemo.c -lpcre
If PCRE is installed elsewhere, you may need to add additional options to the command line. For example, on a Unix-like system that has
PCRE installed in /usr/local, you can compile the demonstration program using a command like this:
gcc -o pcredemo -I/usr/local/include pcredemo.c
-L/usr/local/lib -lpcre
Once you have compiled the demonstration program, you can run simple tests like this:
./pcredemo 'cat|dog' 'the cat sat on the mat'
./pcredemo -g 'cat|dog' 'the dog sat on the cat'
Note that there is a much more comprehensive test program, called pcretest, which supports many more facilities for testing regular expres-
sions and the PCRE library. The pcredemo program is provided as a simple coding example.
On some operating systems (e.g. Solaris), when PCRE is not installed in the standard library directory, you may get an error like this when
you try to run pcredemo:
ld.so.1: a.out: fatal: libpcre.so.0: open failed: No such file or directory
This is caused by the way shared library support works on those systems. You need to add
-R/usr/local/lib
(for example) to the compile command to get round this problem.
AUTHOR
Philip Hazel
University Computing Service
Cambridge CB2 3QH, England.
REVISION
Last updated: 23 January 2008
Copyright (c) 1997-2008 University of Cambridge.
PCRESAMPLE(3)