Probably I am not seeing it or I am not using the "delete" correctly I had the following codes but it does not work for me
#!/bin/perl -w
...
@sysFile1 = (a_b, a_c, a_d);
@sysFile2 = (a_c, a_e, b_f);
foreach $line1 (@sysFile1){
trim(\$line1);
(my $tmp1, my $tmp2) = split/_/,... (6 Replies)
Hi,
I have learned some of the Unix commands a way back and not sure of how to code them when needed in certain way, especially sed command. Here is my situation. I have an xml file with several tags. most of the tags start on the same line and end on the same line. However, data for some tags... (8 Replies)
i want to delete the line which is not started with numeric in vim.
vim temp.txt
Volume in drive D is DATA
Volume Serial Number is 8C52-2055
Directory of D:\data\notes
02/16/2010 03:09 PM <DIR> .
02/16/2010 03:09 PM <DIR> ..
09/11/1999 03:03 AM ... (5 Replies)
How to delete last row in the file in PERL.
file1 has
a.output
b.output
c.output
d.output
e.output
expected output is
a.output
b.output
c.output
d.output (1 Reply)
Hi,
How to delete a file (if exists) using perl script.
I have used following script..
if ( -e $newfile) {
open (FILE, ">$newfile") || die "Cannot Open File\n";
print FILE;
close(FILE);
}
But it gives me error "Use of uninitialized value in print".
please help.
Thanks in... (1 Reply)
Hello All
I am implementing my task in Perl and i found an issue.
What i want to do is to remove files from the directory which were made 20 days back using Perl script (9 Replies)
im having an array @check which contains text ..i want to open the array and i have to delete lines starting from a word called "check1" till "check2"
for eg:-
check1 Use descriptive titles when posting. For example, do not post questions with subjects like "Help Me!", "Urgent!!" or "Doubt".... (0 Replies)
Hi all,
I need a Perl one liner which prints a newline into a .txt file, only where the line starts with "/mediawiki-1.19.0/". It should add the newline to the line before.
My problem is, when I try to realize this (with my little knowledge :rolleyes: ) i come to the point where the // are... (4 Replies)
Dear All,
could you please help me to remove \n characters after all other replacements have been done as in the code below:
{
#remove punctuation and starting whitespaces
gsub("]"," ");
$1=$1;
}
{
#print lines containing 'whatever'
if ($1=="whatever")
{print}
#print... (3 Replies)
I have a directory like below. Need help with Perl to delete all files under test1 except the one passed as parameters.The parameters will
always be the directories under test1 in the format below.
EX:
dir1/abc.txt,dir2/test.xml,dir3/dfb.txt,dir4/text.xml
test1
... (5 Replies)
Discussion started by: gaurav99
5 Replies
LEARN ABOUT CENTOS
truncate
TRUNCATE(1) User Commands TRUNCATE(1)NAME
truncate - shrink or extend the size of a file to the specified size
SYNOPSIS
truncate OPTION... FILE...
DESCRIPTION
Shrink or extend the size of each FILE to the specified size
A FILE argument that does not exist is created.
If a FILE is larger than the specified size, the extra data is lost. If a FILE is shorter, it is extended and the extended part (hole)
reads as zero bytes.
Mandatory arguments to long options are mandatory for short options too.
-c, --no-create
do not create any files
-o, --io-blocks
treat SIZE as number of IO blocks instead of bytes
-r, --reference=RFILE
base size on RFILE
-s, --size=SIZE
set or adjust the file size by SIZE bytes
--help display this help and exit
--version
output version information and exit
SIZE is an integer and optional unit (example: 10M is 10*1024*1024). Units are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB, ...
(powers of 1000).
SIZE may also be prefixed by one of the following modifying characters: '+' extend by, '-' reduce by, '<' at most, '>' at least, '/' round
down to multiple of, '%' round up to multiple of.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report truncate translation bugs to <http://translationpro-
ject.org/team/>
AUTHOR
Written by Padraig Brady.
COPYRIGHT
Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO dd(1), truncate(2), ftruncate(2)
The full documentation for truncate is maintained as a Texinfo manual. If the info and truncate programs are properly installed at your
site, the command
info coreutils 'truncate invocation'
should give you access to the complete manual.
GNU coreutils 8.22 June 2014 TRUNCATE(1)