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Top Forums UNIX for Dummies Questions & Answers add a string to a file without line break Post 302720837 by stunn3r on Wednesday 24th of October 2012 05:06:22 PM
Old 10-24-2012
add a string to a file without line break

I searched and found "echo -n" and "printf" are solution for this, but they are not
here:
Code:
[wadhwaso@nxnixd01 ~]$ echo "hello" >> test 
[wadhwaso@nxnixd01 ~]$ cat test 
hello 
[wadhwaso@nxnixd01 ~]$ echo -n "world" >> test 
[wadhwaso@nxnixd01 ~]$ cat test 
hello 
world 
[wadhwaso@nxnixd01 ~]$ echo -n " seriously?" >> test 
[wadhwaso@nxnixd01 ~]$ cat test 
hello 
world seriously?

This is not successful first time because that line already had a /n. this will be the case for every file.

I am not very comfortable with awk and sed, thats why I wanted to use these.
If I dont have any choice can someone tell me how to add "elevator=noop" in /etc/grub.conf via awk or sed ??

Last edited by stunn3r; 10-24-2012 at 06:07 PM.. Reason: formatting ..
 

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IGAWK(1)							 Utility Commands							  IGAWK(1)

NAME
igawk - gawk with include files SYNOPSIS
igawk [ all gawk options ] -f program-file [ -- ] file ... igawk [ all gawk options ] [ -- ] program-text file ... DESCRIPTION
Igawk is a simple shell script that adds the ability to have ``include files'' to gawk(1). AWK programs for igawk are the same as for gawk, except that, in addition, you may have lines like @include getopt.awk in your program to include the file getopt.awk from either the current directory or one of the other directories in the search path. OPTIONS
See gawk(1) for a full description of the AWK language and the options that gawk supports. EXAMPLES
cat << EOF > test.awk @include getopt.awk BEGIN { while (getopt(ARGC, ARGV, "am:q") != -1) ... } EOF igawk -f test.awk SEE ALSO
gawk(1) Effective AWK Programming, Edition 1.0, published by the Free Software Foundation, 1995. AUTHOR
Arnold Robbins (arnold@skeeve.com). Free Software Foundation Nov 3 1999 IGAWK(1)
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