# first_to_last.pl
my $file = shift;
open(FH, '<', $file) or die "Failed to read file $file : $! \n";
my $first_line = <FH>;
my @remaining_lines = <FH>;
close(FH);
open(FH, '>', $file) or die "Failed to write file $file : $! \n";
print FH @remaining_lines;
print FH $first_line;
close(FH);
run this script as:
Code:
perl first_to_last.pl list.txt
Thanks. That works exactly as I need it to.
Quote:
Originally Posted by danmero
Code:
awk 'NR==1{store=$0;next}1;END{print store}' file
That does what I need it to, but it outputs the results to the console, whereas I need it to output it back to the file. I tried setting it equal to a variable and outputting that to a file, but that output the contents of the file separated by spaces rather than line breaks.
Hi All,
I have written a korn script (code pasted below). It is giving the error while debugging "new.sh: syntax error at line 62: `end of file' unexpected".
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My input file is multiline file and I am writing a script to search for a pattern and move the line with the pattern and the next line to the end of the file. Since I am trying to learn awk, I thought I would try it.
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D #testpoint 1
510.0
D #testpoint2 ... (5 Replies)
Can somebody help me with a script ....
Read a file /etc/inittab
find the string starting with rcml and move it entirely towards the end of file.
rcml:2:once:/usr/sni/aix52/rc.ml > /dev/console 2>&1
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I was given a task to append three IP's at the end of a specific (and unique) line within a file on multiple servers.
I was not able to do that with the help of a script. All I could was:
for i in server1 server2 server3 server4
do
ssh $i
done
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Hey guys,
I want move a specific word from the middle of the text and move it the end of the file, which means I want the word to be deleted from it's line and moved to the end of file.
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tnx (2 Replies)
Hello,
I'm new to this forum. I've been doing a lot of sed work lately and have found many useful tips on this forum. I've hit a roadblock in a project, though, and could really use some help.
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Hello,
I'm works on Ubuntu server
My goal : I would like to read file line per line, but i want to started at the end of file.
Currently, I use instructions :
while read line;
do
COMMAND
done < /var/log/apache2/access.log
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My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
Discussion started by: samonl
9 Replies
LEARN ABOUT DEBIAN
x2sys_merge
X2SYS_MERGE(1gmt) Generic Mapping Tools X2SYS_MERGE(1gmt)NAME
x2sys_merge - Merge an updated COEs tables
SYNOPSIS
x2sys_merge -Amain_COElist.d -Mnew_COElist.d
DESCRIPTION
x2sys_merge will read two crossovers data base and output the contents of the main one updated with the COEs in the second one. The second
file should only contain updated COEs relatively to the first one. That is, it MUST NOT contain any new two tracks intersections (This
point is NOT checked in the code). This program is useful when, for any good reason like file editing NAV correction or whatever, one had
to recompute only the COEs between the edited files and the rest of the database.
-A Specify the file main_COElist.d with the main crossover error data base.
-M Specify the file new_COElist.d with the newly computed crossover error data base.
OPTIONS
No space between the option flag and the associated arguments.
EXAMPLES
To update the main COE_data.txt with the new COEs estimations saved in the smaller COE_fresh.txt, try
x2sys_merge -ACOE_data.txt -MCOE_fresh.txt > COE_updated.txt
SEE ALSO x2sys_binlist(1), x2sys_cross(1), x2sys_datalist(1), x2sys_get(1), x2sys_init(1), x2sys_list(1), x2sys_put(1), x2sys_report(1)GMT 4.5.7 15 Jul 2011 X2SYS_MERGE(1gmt)