Hi,
I just learnt the shell scripting and got working on that right now. I have one problem.
Here i am having a java application that needs to be start and stop using two shell scripts, i.e., starting the java application using one shell script and stopping the application using another... (1 Reply)
#Define the Start/Stop/Status Scripts to include
SSS_SCRIPTS=( prog1 prog2 prog3 etc...... )
#Start the scripts
StartScripts()
{
for SSS in ${SSS_SCRIPTS}
do
./$SSS start
done
}
#Stop the Scripts
StopScripts()
{
for SSS in ${SSS_SCRIPTS}
do
./$SSS stop #<---I... (1 Reply)
Good morning.
I have a tricky one here for me. Hope somebody can help.
I am looking for a way to take a single script in a directory and use it to fire all scripts within a subdirectory.
For example.
Lets say I have the following in /lcl/prd/apps
file1.sh
file2.sh
file3.sh
file4.sh... (2 Replies)
Hi,
We have a requirement wherein we do not want to share the Oracle DB sys and system passwords to be shared with the support desk.
But they will be responsible for starting/shuting down the Database.
Is it possible to write a shell script which will read the sys and system passwords from a... (0 Replies)
I am currently trying out MKS Toolkit C Shell, and I've no problems with it until I try add directories to PATH that are located on a network drive.
When I do that, the shell performance slows down significantly and no longer runs fast. In fact, it takes seconds for something that should take... (1 Reply)
hello,
i have an AIX 6.1 server which has Informix 11.5 Database Engine. When i want to export some databases from the instance for backup or for any other use i can do it with dbexport (informix command). The problem is that when i run this command or when i run script which run this command,... (2 Replies)
Hello community,
I created a script to simply query DB and then analize data. The environment where the script will works is two RedHat machines that access both to an external database. My script runs from the first crontab node. But what about if the first node goes down?
What I need is copy... (2 Replies)
Hi All Rhel Admin
Need a Small Help please Give me a Preinstallation Script and postinstallation script for Kickstart
Preinstallation script
Just Need to Partition 1 TB HDD using LVM
Except Boot
/boot = 500
swap = 16 GB
/ = 850 Gb
8e
And need to format it in ext4
... (1 Reply)
Hi there,
I am wondering if I could add start/stop ksh scripts provided by 3rd party to cluster... I read that script must be ocf/lsb compliant, however, in AIX I can just set up two separate scripts for starting and stopping application. Can similar be done under RH Linux cluster?
Cheers,
c (1 Reply)
Discussion started by: cyjan
1 Replies
LEARN ABOUT REDHAT
rl
rl(1) User Commands rl(1)NAME
rl - Randomize Lines.
SYNOPSIS
rl [OPTION]... [FILE]...
DESCRIPTION
rl reads lines from a input file or stdin, randomizes the lines and outputs a specified number of lines. It does this with only a single
pass over the input while trying to use as little memory as possible.
-c, --count=N
Select the number of lines to be returned in the output. If this argument is omitted all the lines in the file will be returned in
random order. If the input contains less lines than specified and the --reselect option below is not specified a warning is printed
and all lines are returned in random order.
-r, --reselect
When using this option a single line may be selected multiple times. The default behaviour is that any input line will only be
selected once. This option makes it possible to specify a --count option with more lines than the file actually holds.
-o, --output=FILE
Send randomized lines to FILE instead of stdout.
-d, --delimiter=DELIM
Use specified character as a "line" delimiter instead of the newline character.
-0, --null
Input lines are terminated by a null character. This option is useful to process the output of the GNU find -print0 option.
-n, --line-number
Output lines are numbered with the line number from the input file.
-q, --quiet, --silent
Be quiet about any errors or warnings.
-h, --help
Show short summary of options.
-v, --version
Show version of program.
EXAMPLES
Some simple demonstrations of how rl can help you do everyday tasks.
Play a random sound after 4 minutes (perfect for toast):
sleep 240 ; play `find /sounds -name '*.au' -print | rl --count=1`
Play the 15 most recent .mp3 files in random order.
ls -c *.mp3 | head -n 15 | rl | xargs --delimiter='
' play
Roll a dice:
seq 6 | rl --count 2
Roll a dice 1000 times and see which number comes up more often:
seq 6 | rl --reselect --count 1000 | sort | uniq -c | sort -n
Shuffle the words of a sentence:
echo -n "The rain in Spain stays mainly in the plain."
| rl --delimiter=' ';echo
Find all movies and play them in random order.
find . -name '*.avi' -print0 | rl -0 | xargs -n 1 -0 mplayer
Because -0 is used filenames with spaces (even newlines and other unusual characters) in them work.
BUGS
The program currently does not have very smart memory management. If you feed it huge files and expect it to fully randomize all lines it
will completely read the file in memory. If you specify the --count option it will only use the memory required for storing the specified
number of lines. Improvements on this area are on the TODO list.
The program uses the rand() system random function. This function returns a number between 0 and RAND_MAX, which may not be very large on
some systems. This will result in non-random results for files containing more lines than RAND_MAX.
Note that if you specify multiple input files they are randomized per file. This is a different result from when you cat all the files and
pipe the result into rl.
COPYRIGHT
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Arthur de Jong.
This is free software; see the license for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
Version 0.2.7 Jul 2008 rl(1)