With your grep pipeline, any line in TextFile containing the string string1 will be treated by xargs as the name of a file to be passed as an operand to sed. I fail to see how that would meet your ambiguous requirements no matter how I try to guess at what you mean.
And, since you haven't told us what operating system and shell you're using, we have no way of knowing whether or not the non-standard sed -i option is supported on your system.
If sed on your system does have a -i option and what you want to do is replace every occurrence of the string string2 with the string string3 on every line that contains the string string1 and leave lines that do not contain the string string1 unchanged, the obvious way to do what you want is:
and a safer, portable way to do that would be to use:
Dear Don,
Thanks for your reply.
I am running under ubuntu 18.04.
Let me specificially give an example for my case:
Let's say, string1 is keyword, string2 is .
I wish to remove dot sign when keyword is found in line:
I do:
Double quotes is also not sorting it out.
There is no below line in output file:
Of course there isn't. In the command: keyword and . are not just strings, they are regular expressions. And the regular expression . matches any single character. And globally replacing every character in a line with an empty string changes every line that contains keyword into an empty line.
To match a literal period character, try:
or:
This User Gave Thanks to Don Cragun For This Post:
I found this in the forum that searches a file for string1, substitute all occurrences of string2 with string3.
(Title: Replace string2 by string3 where string1 is found in line)
>> sed -i '/string1/s/string2/string3/g' TextFile
How will I perform the same sed command and only substitute... (3 Replies)
Hello,
This is a bit complicated for me.
My scenario in MyFile:
Search string1,
When string1 is found, grep the line containing string1, go back over that line in upward direction and grep the first line containing string2.
Here is an example:
MyFile
His email address... (17 Replies)
My OS is Windows 10 and I am using Cygwin.
The file 1 content is:
USE solution 2; -4.000
USE solution 3; -4.000
…
USE solution 29; -4.000
USE solution 30; -4.000
USE solution 31; -4.000
….
USE solution 89; -4.000
...
USE solution 202; -4.000
etc...
I need to replace... (8 Replies)
Hi All
There is another challenge which stand in front of me. And want all to have the experience with that
I have a file in Unix say a.txt. What I was trying is to read the file line by line and matching the line to particular pattern, and if that pattern found I want to replace that line... (5 Replies)
How do I use awk to find the records in a file that contains two specific strings?
I have tried piping and using awk two times, but I don't know how to do it in one action. (2 Replies)
Hello All...
I have a text file (.ics) which I need to read into a variable but ONLY the part including and after 'BEGIN:VEVENT' and ending with END:VEVENT
Anything before BEGIN:VEVENT or after END:VEVENT should be ignored.
Thanks for input
Jeff
BEGIN:VCALENDAR
VERSION:2.0... (3 Replies)
Hi,
I have a file with the following content:
---------
a 3242 tc_5 gdfg4
random text
a 3242 tc_6 gdfg4
random text
a 3242 tc_7 gdfg4
random text
a 3242 tc_4 gdfg4
---------
I want to replace the lines containing tc_? (tc_5, tc_6 etc. even with unknown numbers) with the found... (5 Replies)
Hi all,
can any one suggest me the script to grep multiple strings from ps -ef
pls correct the below script . its not working/
i want to print OK if all the below process are running in my solaris system. else i want to print NOT OK.
bash-3.00$ ps -ef | grep blu
lscpusr 48 42 ... (11 Replies)
Hi All,
I have a file say abc.xml. In this file, I need to search for a pattern “SAP_GATEWAY_HOST”; if this pattern found and the next line also contain the pattern “nwprc03.cos” then I need to replace this pattern “nwprc03.cos” with some other pattern “nwdrc03.apjp”.
$ cat abc.xml... (3 Replies)