Then use [ \t], since otherwise this will not work if the whitespace happens to be tab:
Or to make it also tolerant to whitespace at the beginning - like the last awk example - use ^[ \t]*[0-9][ \t]
I have a script like this--
#!/bin/ksh
echo "To pad a 0 before digits from 1-9"
for i in $*
do
echo $i | sed 's//'0'/g'
done
I run this script as
ksh name 1 2 23 34
The output should be
01 02 23 34
Help me in modifying this script.
Thanks
Namish (2 Replies)
hi all,
how do i format the date command so it displays day and month in single digits i.e 8 instead of 08 ??
am using the command (in a ksh) : date +%D
output i get is 10/08/08
thanks in advance. (5 Replies)
hi i have a line like
TL1330000000800 000DE9248737900 08000TS0231DE92 87379AMEX0000.T N 0080000000 00000.
if there any single space between strings, i need to delete, if more than one keep the space as it is
can some one help
thanks
Satya (1 Reply)
hi all,
how do i get the month in single digit in ksh script ?? my command for date is :
/usr/bin/date +%Om/%Oe/%y | sed 's/ //g'
which returns "01/16/09" but i need the output to be "1/16/09" i.e the month without leading zero.
thanks in advance. (2 Replies)
I have a var storing date
var=`date`
Now the date is returned as
Mon Feb 2 00:25:48 PST 2009
Is there any way to check the date field alone ("2" in above case) and if its a single digit then add a prefix 0 to it and store the result in same variable "var"
My intention in above case is... (3 Replies)
i had this scenario where i need to delete a file that is 6 months old which is no longer needed. basically the filename is in the format of PCARDDAILYmmddyyyy.txt where the mm is the month, dd is the day, and yyyy is the year.
e.g.
PCARDDAILY05262009.txt
PCARDDAILY05252009.txt
... (6 Replies)
Hi ,
how to add the single digit to front of the word and front of the lines in the one file with compare pattern file and get digit. like example
pattern file pattern.txt
pattern num
bala 2
raja 3
muthu 4
File Name: chennai.dat
muthu is good boy
raja is bad boy
selvam in super... (6 Replies)
here is what i want to achieve.. i have a file with below contents
cat fileName
blah blah blah
.
.DROP this
REJECT that
.
--sport 7800 -j REJECT --reject-with icmp-port-unreachable
--dport 7800 -j REJECT --reject-with icmp-port-unreachable
.
.
.
more blah blah blah
--dport 3306... (14 Replies)
Hi All,
I have a file which keeps count based on completion of a certain activity. I am using the following grep command to return a '1' in case the count is zero
grep -ic "0" abc_count.txt
Now the issue happens when the count is '10', '20' etc .. in these cases as well it returns a... (5 Replies)
Discussion started by: dev.devil.1983
5 Replies
LEARN ABOUT DEBIAN
io::atomicfile
IO::AtomicFile(3pm) User Contributed Perl Documentation IO::AtomicFile(3pm)NAME
IO::AtomicFile - write a file which is updated atomically
SYNOPSIS
use IO::AtomicFile;
### Write a temp file, and have it install itself when closed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->close || die "couldn't install atomic file: $!";
### Write a temp file, but delete it before it gets installed:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->delete;
### Write a temp file, but neither install it nor delete it:
my $FH = IO::AtomicFile->open("bar.dat", "w");
print $FH "Hello!
";
$FH->detach;
DESCRIPTION
This module is intended for people who need to update files reliably in the face of unexpected program termination.
For example, you generally don't want to be halfway in the middle of writing /etc/passwd and have your program terminate! Even the act of
writing a single scalar to a filehandle is not atomic.
But this module gives you true atomic updates, via rename(). When you open a file /foo/bar.dat via this module, you are actually opening a
temporary file /foo/bar.dat..TMP, and writing your output there. The act of closing this file (either explicitly via close(), or
implicitly via the destruction of the object) will cause rename() to be called... therefore, from the point of view of the outside world,
the file's contents are updated in a single time quantum.
To ensure that problems do not go undetected, the "close" method done by the destructor will raise a fatal exception if the rename() fails.
The explicit close() just returns undef.
You can also decide at any point to trash the file you've been building.
AUTHOR
Primary Maintainer
David F. Skoll (dfs@roaringpenguin.com).
Original Author
Eryq (eryq@zeegee.com). President, ZeeGee Software Inc (http://www.zeegee.com).
REVISION
$Revision: 1.2 $
perl v5.12.4 2011-09-18 IO::AtomicFile(3pm)