Running rename command on large files and make it faster
Hi All,
I have some 80,000 files in a directory which I need to rename. Below is the command which I am currently running and it seems, it is taking fore ever to run this command. This command seems too slow. Is there any way to speed up the command. I have have GNU Parallel installed on my system but I am not sure how to run this command using GNU Parallel.
What this script is doing is to rename all .xml.dat files to .xml
Hi,
Not really sure whether this question should go to this forum but am giving it a shot.
I have compiled a simple C program test.c.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int a;
int test()
{
a=a+1;
return a;
}
When I run a make command, I get this:
... (2 Replies)
One of our servers runs Solaris 8 and does not have "ls -lh" as a valid command. I wrote the following script to make the ls output easier to read and emulate "ls -lh" functionality. The script works, but it is slow when executed on a directory that contains a large number of files. Can anyone make... (10 Replies)
Hi,
Can any one help me out in solving the problem i have a linux database server it is tooo slow that i am unable to open even the terminial is there any solution to get rid of this problem.How to make this server faster.
Thanks & Regards
Venky (0 Replies)
Hello,
Error
awk: Internal software error in the tostring function on TS1101?05044400?.0085498227?0?.0011041461?.0034752266?.00397045?0?0?0?0?0?0?11/02/10?09/23/10???10?no??0??no?sct_det3_10_20110516_143936.txt
What it is
It is a unix shell script that contains an awk program as well as... (4 Replies)
Hi all,
In bash scripting, I use to read files:
cat $file | while read line; do
...
doneHowever, it's a very slow way to read file line by line.
E.g. In a file that has 3 columns, and less than 400 rows, like this:
I run next script:
cat $line | while read line; do ## Reads each... (10 Replies)
Hi,
I have a large number of subdirectories (>200), and in each of these directories there is a file with a name like "opp1234.dat".
I'd like to know how I could change the names of these files to say "out.dat" in all these subdirectories in one go.
Thanks! (5 Replies)
Good evening
Im new at unix shell scripting and im planning to script a shell that removes headers for about 120 files in a directory and each file contains about 200000
lines in average.
i know i will loop files to process each one and ive found in this great forum different solutions... (5 Replies)
I have script like below, who is picking number from one file and and searching in another file, and printing output.
Bu is is very slow to be run on huge file.can we modify it with awk
#! /bin/ksh
while read line1
do
echo "$line1"
a=`echo $line1`
if
then
echo "$num"
cat file1|nawk... (6 Replies)
I have the below command which is referring a large file and it is taking 3 hours to run. Can something be done to make this command faster.
awk -F ',' '{OFS=","}{ if ($13 == "9999") print $1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12 }' ${NLAP_TEMP}/hist1.out|sort -T ${NLAP_TEMP} |uniq>... (13 Replies)
I have nginx web server logs with all requests that were made and I'm filtering them by date and time.
Each line has the following structure:
127.0.0.1 - xyz.com GET 123.ts HTTP/1.1 (200) 0.000 s 3182 CoreMedia/1.0.0.15F79 (iPhone; U; CPU OS 11_4 like Mac OS X; pt_br)
These text files are... (21 Replies)
Discussion started by: brenoasrm
21 Replies
LEARN ABOUT DEBIAN
prename
RENAME(1) Perl Programmers Reference Guide RENAME(1)NAME
rename - renames multiple files
SYNOPSIS
rename [ -v ] [ -n ] [ -f ] perlexpr [ files ]
DESCRIPTION
"rename" renames the filenames supplied according to the rule specified as the first argument. The perlexpr argument is a Perl expression
which is expected to modify the $_ string in Perl for at least some of the filenames specified. If a given filename is not modified by the
expression, it will not be renamed. If no filenames are given on the command line, filenames will be read via standard input.
For example, to rename all files matching "*.bak" to strip the extension, you might say
rename 's/.bak$//' *.bak
To translate uppercase names to lower, you'd use
rename 'y/A-Z/a-z/' *
OPTIONS -v, --verbose
Verbose: print names of files successfully renamed.
-n, --no-act
No Action: show what files would have been renamed.
-f, --force
Force: overwrite existing files.
ENVIRONMENT
No environment variables are used.
AUTHOR
Larry Wall
SEE ALSO mv(1), perl(1)DIAGNOSTICS
If you give an invalid Perl expression you'll get a syntax error.
BUGS
The original "rename" did not check for the existence of target filenames, so had to be used with care. I hope I've fixed that (Robin
Barker).
perl v5.14.2 2014-09-26 RENAME(1)