Sponsored Content
Top Forums Shell Programming and Scripting using awk to comment out lines to the end of file Post 302331210 by phamp008 on Saturday 4th of July 2009 05:58:12 PM
Old 07-04-2009
Thanks that works well

May I ask where can read on reference for

f{$0 = "#" $0} ?
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Blank Lines - End of file

Hi all I need to strip blank lines from the end of a file. I have searched and found topics on how to strip lines from the entirety of a file - however I need to limit this to only the last 3-4 lines. Any ideas? Thanks (4 Replies)
Discussion started by: saabir
4 Replies

2. Shell Programming and Scripting

deleting the lines at the end of the file.

I have a text file with two coulmn first column is just used in to show the line number, these line number are not there in the real file. I want to delete the line 16(in this file) here, even tough there is no data inside it . this empty line is causing me a problem by throwing me garbage... (12 Replies)
Discussion started by: shashi792
12 Replies

3. Shell Programming and Scripting

how to find and comment out lines in one file against another file

I have 2 files: fileA and fileB. content of fileA --------------- admin.teacher is in new york; admin.mason is in new york; admin.driver is in new york city; user.trucker is in hartford; admin.developer is in new york state; content of fileB ---------------- admin.teacher is in... (2 Replies)
Discussion started by: lowprofile
2 Replies

4. Shell Programming and Scripting

sed/awk script to replace only FIRST comment in the file

My first comment on every file contains the license message. I want to replace with a new license message. I used the below sed script, which replaces all comments. What is the modification or any other method with awk script for the below to edit only the first comment(license message)? #sed -f... (1 Reply)
Discussion started by: vpshastry
1 Replies

5. UNIX for Dummies Questions & Answers

Comment lines in file without vi editor

Legends, Can you please help me in following. I need to comment lines from “/tmp/a.txt” from the line A to line B through the command prompt only. Please use variables not direct values like 2 or 5 It can be done with VI editor but it's not matches with my requirement (: 2,5 s/^/#/g). ... (1 Reply)
Discussion started by: sdosanjh
1 Replies

6. Shell Programming and Scripting

Comment ( -- ) lines from 10 to 25 for every .sql file

Platform : RHEL 5.4 I have several .sql files in a directory. I want to comment lines 10 to 25 for all .sql files. How can I do this ? The symbol for comment in SQL is -- eg: -- select salary from emp where empname = 'URS' ; (3 Replies)
Discussion started by: omega3
3 Replies

7. Shell Programming and Scripting

Put the lines from file A to end of lines in file B

I really can't figure this one out. I have 2 files, one file is a list of hostnames and the other is a list of their corresponding IPs: fileA: example.com another.org thirdie.net fileB: 1.1.1.1 2.2.2.2 3.3.3.3 I want to create a fileC that looks like: example.com 1.1.1.1... (2 Replies)
Discussion started by: zstar
2 Replies

8. Shell Programming and Scripting

Find between lines start and end: awk with bash variables

I have a file as follows: 0 1056 85540 414329 774485 1208487 1657519 2102753 2561259 3037737 3458144 3993019 4417959 4809964 5261890 5798778 6254146 I want to find all lines between a specified start and end tag. (6 Replies)
Discussion started by: jamie_123
6 Replies

9. Shell Programming and Scripting

Script using awk to find and replace a line, how to ignore comment lines

Hello, I have some code that works more or less. This is called by a make file to adjust some hard-coded definitions in the src code. The script generated some values by looking at some of the src files and then writes those values to specific locations in other files. The awk code is used to... (3 Replies)
Discussion started by: LMHmedchem
3 Replies

10. UNIX for Beginners Questions & Answers

Remove Comment Lines From Script/Input File

Hello, I have a SAS code that predominantly has comments line and the real code like below and i want to remove ONLY THE COMMENTS from the code in the single line or spanned across multiple lines. /******************************************************************** *** This Is a Comment... (4 Replies)
Discussion started by: arooonatr
4 Replies
SD-READAHEAD(7) 						   sd-readahead 						   SD-READAHEAD(7)

NAME
sd-readahead - Reference implementation of APIs for controlling boot-time read-ahead SYNOPSIS
#include "sd-readahead.h" DESCRIPTION
sd-readahead.c and sd-readahead.h provide a reference implementation for APIs for controlling boot-time read-ahead, as implemented by the read-ahead subsystem of the systemd(1) init system. See sd_readahead(3) for more information about the function implemented. NOTES
This interface is provided by the reference implementation of APIs for controlling boot-time read-ahead and distributed with the systemd package. The algorithms it implements are simple, and can easily be reimplemented in daemons if it is important to support this interface without using the reference implementation. See the respective function man pages for details. In addition, for details about the algorithms check the liberally licensed reference implementation sources: http://cgit.freedesktop.org/systemd/systemd/plain/src/readahead/sd-readahead.c resp. http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-readahead.h These APIs are implemented in the reference implementation's drop-in sd-readahead.c and sd-readahead.h files. It is recommended that applications consuming these APIs copy the implementation into their source tree, either verbatim or in excerpts. These interfaces are currently not available in a dynamic library. The functions provided by this interface become NOPs when -DDISABLE_SYSTEMD is set during compilation. In addition, if sd-readhead.c is compiled on non-Linux systems it becomes NOPs. SEE ALSO
systemd(1), sd_readahead(3), sd-daemon(7) AUTHOR
Lennart Poettering <lennart@poettering.net> Developer systemd 03/16/2012 SD-READAHEAD(7)
All times are GMT -4. The time now is 01:27 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy