A painfully rudimentary UNIX question for somebody. I've been puzzling over this for the last hour but can't find the right command.
I'm simply trying to get a list of all files - and their full paths - within a folder & subfolders which have extension .php and .js. That's it! No amount of... (1 Reply)
i need to change string in all files in current folder and all subfolders. i wrote the following script. It works good except it dont delete temp file from subfolders.
for z in `find . -type f -name "*.html" -o -name "*.htm"`; do
sed -e 's@abc@xyz@g' $z>temp;
mv temp $z;
done
any idea?... (1 Reply)
Hi,
I am trying to write a shell script to delete logs generate by db when space in the folder reaches 70%. i am getting space values from db, find the files at OS and remove them by using a cron job runs every 5minutes.
I have to keep the latest 5 files at any time, my problem is that log files... (3 Replies)
Hello,
I have two folders.
One has 1183 text files (folder A).
The other (folder B) has 1160 of those 1183 files (the contents in these 1160 files are identical to the contents in the corresponding files in the other folder, but the names of the files in this folder are completely different... (2 Replies)
First of all, the extent of my unix knowledge is next to nil. I've been able to telnet to a unix box, and thanks to the Computer Hope website, I've been able to learn a few basic commands to navigate from folder to folder, and view contents.
What I really need to do is obtain a count of all... (2 Replies)
How can this be done?
I mean, I want to search for all *png *jpg *bmp files in my ~/Pictures/ folder....How can I list them?
Thank you geeks :) :b: (2 Replies)
Hello,
Neither ‘Grep -r' nor ‘grep -R' is working in my environment. (Searching for a text pattern in the files)
Any suggestions... Using SunOS 5.9
Thanks,
Trinanjan. (1 Reply)
I have a folder with 4000 (*3) files like
gr_q4_gb-1.anc
gr_q4_gb-1.anc_cdr_st.txt
gr_q4_gb-1.anc_cdr_tr.txt
gr_q4_gb-2.anc
gr_q4_gb-2.anc_cdr_st.txt
gr_q4_gb-2.anc_cdr_tr.txt
gr_q4_gb-3.anc
gr_q4_gb-3.anc_cdr_st.txt
gr_q4_gb-3.anc_cdr_tr.txt
.
.
gr_q4_gb-4000.anc... (6 Replies)
Discussion started by: sammy777888
6 Replies
LEARN ABOUT NETBSD
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)