10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Say you want to clear your .bash_history except for the first 25 lines. Try:
sed -i -e 26,500d .bash_historyI have a some frequently-used routines parked in the first few lines, and they kept getting overwritten by more recent commands. (2 Replies)
Discussion started by: Xubuntu56
2 Replies
2. Shell Programming and Scripting
Hi All,
I want to write a script which first check the line counts of a file if its more than 500 it deletes rest except the last 500..
I tried sed but it looks sed counts line numbers from the head & not from tail.. May be I need a wc -l frist then apply if statement & pass on the line count... (17 Replies)
Discussion started by: ailnilanjan
17 Replies
3. Shell Programming and Scripting
Hello, im using ex to manipulate some text. Im trying to delete all the lines except those on which a certain regex can be found.
the important part of the script:
ex temp << 'HERE'
g/regex/p
HERE
this command prints the lines I want to end up with, but it doesnt delete the others.... (2 Replies)
Discussion started by: drareeg
2 Replies
4. Shell Programming and Scripting
hi all,
i have got a scenario in which i need to delete all the lines that ends with file names.
e.g.
input can be
cms/images/services_icons/callback.png
cms/cms/images/services_icons/sync.php
cms/cms/images/services_icons
and output should be
cms/cms/images/services_icons
... (13 Replies)
Discussion started by: kashifv
13 Replies
5. Shell Programming and Scripting
I have a log file that I am processing. This contains messages from and to a server (requests and responses).
The responses to requests may not be in order i.e. we can have a response to a request after several requests are sent, and in some error cases there may not be any response message.
... (2 Replies)
Discussion started by: BootComp
2 Replies
6. UNIX for Dummies Questions & Answers
Hi All,
I am trying to extract lines bsed on pattern matching../mp straight-flow/
Extracted output should be saved in meta_string , but the code is not working in that manner,saving repeated lines. can anyone please suggest where am i going wrong.
/mp straight-flow/ {... (6 Replies)
Discussion started by: madhaviece
6 Replies
7. UNIX for Dummies Questions & Answers
I have a file with 65 sets of 35 coordinates, and would like to isolate these coordinates so that I can easily copy the coordinates to another file. The problem is, I've got a 9 line header before each set of coordinates (so each set is 44 lines long). There are a zillion threads out there about... (3 Replies)
Discussion started by: red baron
3 Replies
8. Shell Programming and Scripting
Hi
I have a file & always I need to remove or delete last 2 lines from that file. So in a file if I have 10 lines then it should return me first 8 lines.
Can someone help me? (4 Replies)
Discussion started by: videsh77
4 Replies
9. Shell Programming and Scripting
I am trying deleting lines from a text file using sed..
sed '/OBJECT="ABC/{N;N;N;d; }'
will do if i have to delete lines starting with Object and next 3 lines
but I was looking for a way to delet lines starting with OBJECT and all the lines till it reaches a blank lines ..or it reaches a... (8 Replies)
Discussion started by: ajnabi
8 Replies
10. Programming
I am spooling a file from oracle and trying to delete the last line of the spooled file which I am unable to do.
Problem is that this file can have multiple records each time and I have no way of knowing how many because the amount can vary. I had an idea of using a while loop to read the... (1 Reply)
Discussion started by: supercbw
1 Replies