If you have files/directories with spaces in their name, the following enhacement might also be usefull (probably only works with GNU coreutils systems):
Hi,
how can I write a small script to run the following statement and output the result into check_result.txt
select /*+RULE*/ tapname from typetbl where tapname like 'AA%' and rejectcode=9;
Normally, I just type sql and get into SQL> (2 Replies)
Hi All,
this small script is written to recognize user input character.. it is in small case .. upeer case or is a number... but when i input first capital letter say A.. it always gives small character.... what is the problem.
#!/bin/bash
echo "Enter the character"
read a
case $a in
)... (2 Replies)
The following Script takes each extension and determine what category it
belongs and then moves it into a directory based on the extension.
(for eg. 1.sh, 5.sh, 9.sh together; 4.csh, 120.csh, 6.csh together and 7.ksh, 2.ksh, 59.ksh together) and moves them to their respective directories viz.... (2 Replies)
Hi Guys,
Please can some one explain me the below part of code. In this code what is the use of the line in Bold.
COPY=0
if ; then
echo "$CONF exists and is non-empty - backing it up"
SUFFIX=`date +%Y%m%d%H%M%S`
echo "cp -p $CONF $CONF.$SUFFIX"
cp -p $CONF... (4 Replies)
Hi Buddies,
The following is shell scripts which was borrowed from linux box for load average check. it runs good.
(this structure is simple, when load average is too high, it will send alert to user)
#!/usr/bin/ksh
# Set threshold for 1, 5 and 15 minture load avarage
# configured for... (4 Replies)
I'm trying to read a bunch of log files and output the lines that contain particular strings.
To accomplish this, I've been running the following from the command line:
find . -name "*" | xargs grep " " | grep " " > output.txt
Two grep statements are needed in case I'm looking for a... (3 Replies)
Hi all,
I get data-files which has a particular identified on the 1st record( header ), based on which I've to load a constant for the 1st column of every row. How do I set in the control file using unix shell script.
Appreciate if someone can give me some directions on this.
Thanks in... (3 Replies)
I have a scenario where i need to look for files of these kind
filename.log.0
filename.log.1
if the files are present, then no action is to be taken, if not found,
then it shud create/touch files with the same name.
so can anyone help constructing the script for me..appreciate ur help.
... (5 Replies)
Dear Unix gurus,
We have a config shell script file which has 30 variables which needs to be passed to master unix shell script that invokes oracle database sessions. So those 30 variables need to go through the database sessions (They are inputs) via a shell script. one of the variable name... (1 Reply)
Dear Unix gurus,
We have a config shell script file which has 30 variables which needs to be passed to master unix shell script that invokes oracle database sessions. So those 30 variables need to go through the database sessions (They are inputs) via a shell script. one of the variable name... (1 Reply)
Discussion started by: dba1981
1 Replies
LEARN ABOUT PHP
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)