How would I write a command(s) to read from a file (list) that looks like this: 29847374384 and grep from a second file (list) that looks like this: 29847374384, jkdfkjdf,3833,ddd:confused: (1 Reply)
Hi, is there a bullet proof of getting the history of all commands entered by a user on a specific server and idealy with the times ?
We have several servers. Therefore we can simply logon to one and do RLOGINS to go to others. We always first logon to servers with our personnal login and then... (4 Replies)
I have one base file, and multiple target files-- each have uniform line structure so no need to use grep to find things-- can just define sections by line number.
My question is quite simple-- can I use sed to copy a defined block of lines (say lines 5-10) from filename1.txt to overwrite an... (3 Replies)
Dear all,
I have a file like below. I want to replace all the '.' in the 3rd column with 'NA'. I don't know how to do that. Anyone has an iead? Thanks a lot!
8 70003200 21.6206
9 70005700 17.5064
10 70002200 .
11 70005100 19.1001
17 70008000 16.1970
32 70012400 26.3465
33... (9 Replies)
My need is :
Want to change
docBase="/something/something/something"
to
docBase="/only/this/path/for/all/files"
I have some (about 250 files)xml files.
In FileOne it contains
<Context path="/PPP" displayName="PPP" docBase="/home/me/documents" reloadable="true" crossContext="true">... (1 Reply)
Hi,
I am trying to use sed to replace a file path within all the .lay (.txt) files in a folder. I feel that this should be easy but I can't get it to work no matter what i try.
I'm using cygwin.
For a .txt file containing the below line I want to replace this file path with a new one.
... (1 Reply)
Hi,
I tried below method;
mv -v /oracle1/scr/tilki/willsendtilkiNew/VOICE-MO_$nfname.gz \
$(echo /oracle1/scr/tilki/willsendtilkiNew/VOICE-MO_$nfname.gz | tr 'dat' 'txt');
nfame variable has the string "dat" .
I need to rename files like below;
ASIS: 20140902103700_100319.dat.gz... (8 Replies)
Hi dears
i have text file like this:
INPUT.txt
001_1_173 j nuh ]az
001_1_174 j ]esma. nuh ]/.xori
.
.
. and have another text
like this
TABLE.txt
j j
nuh word1... (6 Replies)
Hi I want to read a text file and replace various number of spaces between each string in to a single "," or any other character .Please let me know the command to do so. My input file is a txt file which is the output of a SQL table extract so it contains so many spaces between each column of the... (2 Replies)
Discussion started by: Hari Prasanth
2 Replies
LEARN ABOUT MOJAVE
io::atomicfile5.18
IO::AtomicFile(3) User Contributed Perl Documentation IO::AtomicFile(3)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 v5.18.2 2005-02-10 IO::AtomicFile(3)