Don't know your platform but you may have the 'time' command available. It will give you the time it takes for a command to finish. That way you can test it yourself. On a management server we have:
Hi all you enlightened unix people,
I've been trying to execute a perl script that contains the following line within backticks:
`grep -f patternfile.txt otherfile.txt`;It takes normally 2 minutes to execute this command from the bash shell by hand.
I noticed that when i run this command... (2 Replies)
Hi,
A datafile containing lines such as below needs to be split:
500000000000932491683600000000000000000000000000016800000GS0000000000932491683600*HOME
I need to get the 2-5, 11-20, and 35-40 characters and I can do it via cut command.
cut -c 2-5 file > temp1.txt
cut -c 11-20 file >... (9 Replies)
I'm sorting files from a source directory by size into 4 categories then copying them into 4 corresponding folders, just wondering if there's a faster/better/more_elegant way to do this:
find /home/user/sourcefiles -type f -size -400000k -exec /bin/cp -uv {} /home/user/medfiles/ \;
find... (0 Replies)
we have 30 GB files on our filesystem which we need to copy daily to 25 location on the same machine (but different filesystem).
cp is taking 20 min to do the copy and we have 5 different thread doing the copy.
so in all its taking around 2 hr and we need to reduce it.
Is there any... (9 Replies)
Hi,
I have a script below for extracting xml from a file.
for i in *.txt
do
echo $i
awk '/<.*/ , /.*<\/.*>/' "$i" | tr -d '\n'
echo -ne '\n'
done
.
I read about using multi threading to speed up the script.
I do not know much about it but read it on this forum.
Is it a... (21 Replies)
awk "/May 23, 2012 /,0" /var/tmp/datafile
the above command pulls out information in the datafile. the information it pulls is from the date specified to the end of the file.
now, how can i make this faster if the datafile is huge? even if it wasn't huge, i feel there's a better/faster way to... (8 Replies)
Hello guys,
I'm cleaning out big XML files (we're talking about 1GB at least), most of them contain words written in a non-latin alphabet.
The command I'm using is so slow it's not even funny:
cat $1 | sed -e :a -e 's/<*>//g;/</N;//ba;s/</ /g;s/>/... (4 Replies)
Hi,
I have a large number of input files with two columns of numbers.
For example:
83 1453
99 3255
99 8482
99 7372
83 175
I only wish to retain lines where the numbers fullfil two requirements. E.g:
=83
1000<=<=2000
To do this I use the following... (10 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 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)
Discussion started by: Peu Mukherjee
13 Replies
LEARN ABOUT LINUX
times
TIMES(P) POSIX Programmer's Manual TIMES(P)
NAME
times - write process times
SYNOPSIS
times
DESCRIPTION
The times utility shall write the accumulated user and system times for the shell and for all of its child processes, in the following
POSIX locale format:
"%dm%fs %dm%fs
%dm%fs %dm%fs
", <shell user minutes>,
<shell user seconds>, <shell system minutes>,
<shell system seconds>, <children user minutes>,
<children user seconds>, <children system minutes>,
<children system seconds>
The four pairs of times shall correspond to the members of the <sys/times.h> tms structure (defined in the Base Definitions volume of
IEEE Std 1003.1-2001, Chapter 13, Headers) as returned by times(): tms_utime, tms_stime, tms_cutime, and tms_cstime, respectively.
OPTIONS
None.
OPERANDS
None.
STDIN
Not used.
INPUT FILES
None.
ENVIRONMENT VARIABLES
None.
ASYNCHRONOUS EVENTS
Default.
STDOUT
See the DESCRIPTION.
STDERR
The standard error shall be used only for diagnostic messages.
OUTPUT FILES
None.
EXTENDED DESCRIPTION
None.
EXIT STATUS
Zero.
CONSEQUENCES OF ERRORS
Default.
The following sections are informative.
APPLICATION USAGE
None.
EXAMPLES
$ times
0m0.43s 0m1.11s
8m44.18s 1m43.23s
RATIONALE
The times special built-in from the Single UNIX Specification is now required for all conforming shells.
FUTURE DIRECTIONS
None.
SEE ALSO
Special Built-In Utilities
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
ogy -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE
and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained
online at http://www.opengroup.org/unix/online.html .
IEEE /The Open Group 2003 TIMES(P)