Note that MadeInGermany's suggestion only works if there are only two fields on lines that start with SITES. It will replace the 2nd and any following fields the way it is currently written.
I will assume you're using bash as your shell (since cmd &> tmp runs cmd in the background and creates an empty file named tmp on most other shells).
And, I'll assume you're using GNU sed (since the -i option is one of the GNU extensions to sed). I'm not a fan of the -i option to sed (especially when a backup file option-argument is not supplied). But, I think you'll get a syntax error for a mismatched closing parenthesis on the command you showed us.
Assuming you wanted to use $site as an option-argument to the -i option, you might try:
This is untested, and I don't have a GNU sed available to test it. I think you'll need the --posix to get the RE and replacement processing in the substitute command to work correctly and I don't think that will disable the -i option, but the man page doesn't give nearly enough information for me to determine that.
On most systems sed will be faster than awk for small jobs because it is smaller and takes less time to exec. And, if you're running it thousands of time, the difference may matter. You'll have to run some performance tests to see which is faster on your configuration.
Note that this sed command will leave backup files laying around whether or not the command was successful and may leave the source file in an undefined state if an error was encountered (but you'll be able to manually restore it from the backup file) while your awk script with the mv command will get rid of tmp if the command completes successfully and leave the source file unchanged if it failed.
This User Gave Thanks to Don Cragun For This Post:
GNU sed version 4.1.4 on Windows XP SP3 from GnuWin32
I think that I've come across a seemingly simple text file change problem on a INI formatted file that I can't do with SED without side effects edge cases biting me. I've tried to think of various ways of doing this elegantly and quickly... (5 Replies)
using sed to replace a specific string on a specific line number using variables
this is where i am at
grep -v WARNING output | grep -v spawn | grep -v Passphrase | grep -v Authentication | grep -v '/sbin/tfadmin netguard -C'| grep -v 'NETWORK>' >> output.clean
grep -n Destination... (2 Replies)
Ok so all i'm trying to do here is output a file and change the color of a specific word. I can't use grep with color because I need all lines of the file not just lines that match the pattern.
I can get this substitution to work but when it displays it shows exactly what i'm putting it rather... (14 Replies)
Hello,
I have this file.
aaa
port=1234
time
bbb
port=2233
name
ccc
port=4444
name
Is there any way with sed to change only the occurence of "port" which comes after section to have as output : (12 Replies)
Hi everyone,
I was wondering how could from a file where each row is separated by tabulations, the row values where are in blank replace them by a string or value.
My file has this form:
26/01/09 13:45:00 0 0
26/01/09 14:00:00 1495.601318 0
26/01/09 14:15:00 1495.601318 0 ... (4 Replies)
Dear All,
New to Linux/Unix OS, my Linux version is 2010 x86_64 x86_64 x86_64 GNU/Linux
As titled, I wonder if you can help to provide a solution to find and change an specific string in a file
The file include a lots of data in following configuration but might be various in... (3 Replies)
Hi,
I am writing a shell script where I want that # should be added in all those lines as the first character where the pattern matches.
file has lot of functions defined
a.sh
#!/bin/bash
fn a {
beautiful evening
sunny day
}
fn b {
}
fn c {
hello world .its a beautiful day
... (12 Replies)
Hello All of Master Script ,
i need help to solve my problem
before :
mount /dev/rdsk/c1t69d0s6 /dev/rdsk/c1t69d0s6 /vol/cl123/PURGE1 ufs
mount /dev/rdsk/c1t70d0s6 /dev/rdsk/c1t70d0s6 /vol/cl123/PURGE2 ufs
expected :
mount /dev/dsk/c1t69d0s6 /dev/rdsk/c1t69d0s6 /PURGE1 ufs
mount ... (3 Replies)
I am trying to use awk to change a specific string in a field, if it is found, to another value. In the tab-delimited file the text in bold in $3 contains the string 23, which is always right before a ., if it is present.
I am trying to change that string to X, keeping the formatting and the... (3 Replies)
Hi,
Could you please help me finding a way to replace a specific value in a text block when matching a key pattern ?
I got the keys and the values from a command similar to:
echo -e "key01 Nvalue01-1 Nvalue01-2 Nvalue01-3\nkey02 Nvalue02-1 Nvalue02-2 Nvalue02-3 \nkey03 Nvalue03-1... (2 Replies)