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)
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)
Dear experts
I have a 200MG text file in this format:
text \tab number
I try to sort using options -fd and it takes very long! is that normal or I can speed it up in some ways?
I dont want to split the file since this one is already splitted.
I use this command: sort -fd file >... (12 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,
Below is my find command
find /opt/app/websphere -name myfolder -perm -600 | wc -l
At time it even takes 20 mins to complete.
my OS is : SunOS mypc 5.10 Generic_150400-09 sun4v sparc SUNW,T5440 (10 Replies)
Hi,
I have a lengthy script which i have trimmed down for a test case as below.
more run.sh
#!/bin/bash
paths="allpath.txt"
while IFS= read -r loc
do
echo "Working on $loc"
startdir=$loc
find "$startdir" -type f \( ! -name "*.log*" ! -name "*.class*" \) -print |
while read file
do... (8 Replies)
I need to check if the files returned by ls command in the below script is a sub-string of the argument passed to the script i.e $1
The below script works fine but is too slow.
If the ls command take 12 secs to complete printing all files with while loop then; using posix substring check... (6 Replies)
Discussion started by: mohtashims
6 Replies
LEARN ABOUT CENTOS
sttydefs
sttydefs(1M) System Administration Commands sttydefs(1M)NAME
sttydefs - maintain line settings and hunt sequences for TTY ports
SYNOPSIS
/usr/sbin/sttydefs -a ttylabel [-b] [-f final-flags] [-i initial-flags] [-n nextlabel]
/usr/sbin/sttydefs -l [ttylabel]
/usr/sbin/sttydefs -r ttylabel
DESCRIPTION
sttydefs is an administrative command that maintains the line settings and hunt sequences for the system's TTY ports by making entries in,
and deleting entries from the /etc/ttydefs file.
sttydefs with a -a or -r option may be invoked only by the super-user. sttydefs with -l may be invoked by any user on the system.
OPTIONS
The following options are supported:
-a ttylabel Add a record to the ttydefs file, using ttylabel as its label. The following describes the effect of the -b, -n,
-i, or -f options when used in conjunction with the -a option:
-b Enable autobaud. Autobaud allows the system to set the line speed of a given TTY port to the line speed of the
device connected to the port without
the user's intervention.
-f final-flags Specify the value to be used in the final-flags field in /etc/ttydefs. final-flags must be in a format recognized
by the stty command. final-flags are the termio(7I) settings used by ttymon after receiving a successful connection
request and immediately before invoking the service on the port. If this option is not specified, sttydefs will set
final-flags equal to the termio(7I) flags 9600 and sane.
-i initial-flags Specify the value to be used in the initial-flags field in /etc/ttydefs. initial-flags must be in a format recog-
nized by the stty command. These flags are used by ttymon when searching for the correct baud rate. They are set
prior to writing the prompt. If this option is not specified, sttydefs will set initial-flags equal to the
termio(7I) flag 9600.
-n nextlabel Specify the value to be used in the nextlabel field in /etc/ttydefs. If this option is not specified, sttydefs will
set nextlabel equal to ttylabel.
-l[ttylabel] If a ttylabel is specified, sttydefs displays the record from /etc/ttydefs whose TTY label matches the specified
ttylabel. If no ttylabel is specified, sttydefs displays the entire contents of /etc/ttydefs. sttydefs verifies
that each entry it displays is correct and that the entry's nextlabel field references an existing
-r ttylabel Remove any record in the ttydefs file that has ttylabel as its label.
OUTPUT
If successful, sttydefs will exit with a status of 0. sttydefs -l will generate the requested information and send it to standard output.
EXAMPLES
Example 1: A sample of sttydefs command.
The following command lists all the entries in the ttydefs file and prints an error message for each invalid entry that is detected.
example# sttydefs -l
The following shows a command that requests information for a single label and its output:
example# sttydefs -l 9600
------------------------------------------------------------------
9600:9600 hupcl erase ^h:9600 sane ixany tab3 hupcl erase ^h::4800
------------------------------------------------------------------
ttylabel: 9600
initial flags: 9600 hupcl erase ^h
final flags: 9600 sane ixany tab3 hupcl erase ^h
autobaud: no
nextlabel: 4800
The following sequence of commands will add the labels 1200, 2400, 4800, and 9600 and put them in a circular list:
sttydefs -a 1200 -n 2400 -i 1200 -f "1200 sane"
sttydefs -a 2400 -n 4800 -i 2400 -f "2400 sane"
sttydefs -a 4800 -n 9600 -i 4800 -f "4800 sane"
sttydefs -a 9600 -n 1200 -i 9600 -f "9600 sane"
FILES
/etc/ttydefs
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
SEE ALSO attributes(5), termio(7I)SunOS 5.10 14 Sep 1992 sttydefs(1M)