After my previous thread, I think I found out what causes the long delays.
I run this program on several Linux computers, and the sometimes (after the file with the arrays becomes big) the fwrite takes between 100 ms to 900 ms.
This is very bad for me, as I want a timer to halt each 30 ms.... ... (5 Replies)
Hello,
I have a C program that takes anywhere from 5 to 100 arguments and I'd like to run it from a script that makes sure it doesnt take too long to execute. If the C program takes more than 5 seconds to execute, i would like the shell script to kill it and return a short message to the user. ... (3 Replies)
Hi all,
I wrote this shell script to validate filed numbers for input file. But it take forever to complete validation on a file. The average speed is like 9mins/MB.
Can anyone tell me how to improve the performance of a shell script?
Thanks (12 Replies)
Hi,
I am trying to login using ssh on Red Hat Linux 5 server,
The password appears immediately but after I enter the password it takes about 90 seconds to login completely.
Please suggest what changes require?
Regards,
Manoj (4 Replies)
Hello,
like the title says, how can i measure the time it takes to load a module in Linux, and how how can i measure the time it takes to load a statically compiled module.
/Best Regards Olle
---------- Post updated at 01:13 PM ---------- Previous update was at 11:54 AM ----------
For... (0 Replies)
We are running unix. After a reboot of the server we have found that changing password takes a long time. if type in passwd "username" you can type in the 1st instance of the password , press enter , then it will wait for about 3 minutes before bringing up the confirm password line typing it in... (4 Replies)
Hi,
we currently having a issue where when we send jobs to the server for the application lawson, it is taking a very long time to complete. here are the last few lines of the database log.
2012-09-18-10.35.55.707279-240 E244403536A576 LEVEL: Warning
PID : 950492 ... (1 Reply)
Hi,
I wish to check the return value for wget $url.
However, some urls are designed to take 45 minutes or more to return.
All i need to check if the URL can be reached or not using wget.
How can i get wget to return the value in a few seconds ? (8 Replies)
Hi,
I am trying to search for a Directory called "mont" under a directory path "/opt/app/var/dumps"
Although "mont" is in the very parent directory called "dumps" i.e "/opt/app/var/dumps/mont" and it can never be inside any Sub-Directory of "dumps"; my below find command which also checks... (5 Replies)
It takes 6 hrs for a 90 GB zip file that i am copying / transferring from serverA onto serverB.
scp user1@serverA:/opt/setup/cash.zip .
Output:
cash.zip 21% 19GB 4.7MB/s 4:11:46 ETA
uname -a
SunOS serverB 5.11 11.2 sun4v sparc sun4vCan you please suggest if i could do... (11 Replies)
Discussion started by: mohtashims
11 Replies
LEARN ABOUT CENTOS
look
LOOK(1) User Commands LOOK(1)NAME
look - display lines beginning with a given string
SYNOPSIS
look [options] string [file]
DESCRIPTION
The look utility displays any lines in file which contain string. As look performs a binary search, the lines in file must be sorted
(where sort(1) got the same options -d and/or -f that look is invoked with).
If file is not specified, the file /usr/share/dict/words is used, only alphanumeric characters are compared and the case of alphabetic
characters is ignored.
OPTIONS -a, --alternative
Use the alternative dictionary file.
-d, --alphanum
Use normal dictionary character set and order, i.e. only alphanumeric characters are compared. (This is on by default if no file is
specified.)
-f, --ignore-case
Ignore the case of alphabetic characters. (This is on by default if no file is specified.)
-t, --terminate character
Specify a string termination character, i.e. only the characters in string up to and including the first occurrence of character are
compared.
-h, --help
Display help text and exit.
-V, --version
Output version information and exit.
The look utility exits 0 if one or more lines were found and displayed, 1 if no lines were found, and >1 if an error occurred.
EXAMPLE
sort -d /etc/passwd -o /tmp/look.dict
look -t: root:foobar /tmp/look.dict
FILES
/usr/share/dict/words
the dictionary
/usr/share/dict/web2
the alternative dictionary
SEE ALSO grep(1), sort(1)COMPATIBILITY
The original manual page stated that tabs and blank characters participated in comparisons when the alphanum option was specified. This
was incorrect, and the current man page matches the historic implementation.
HISTORY
The look utility appeared in Version 7 AT&T Unix.
AVAILABILITY
The look command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux June 2011 LOOK(1)