I tested on 100,000 files in a temporary directory like this:-
Does this help? There are far fewer rm commands called so it should run faster because they're not spawning a process for each file, however the IO overhead will still be the same. For my test, I actually ran rm five times.
Robin
Last edited by rbatte1; 01-20-2017 at 08:39 AM..
Reason: Quantified testing
I have a task to move more than 35000 files every two hours, from the same directory to another directory based on a file that has the list of filenames
I tried the following logics
(1)
find . -name \*.dat > list
for i in `cat list` do mv $i test/ done
(2)
cat list|xargs -i mv "{}"... (7 Replies)
I have a large Filesystem on an AIX server and another one on a Red Hat box. I have syncd the two filesystems using rsysnc.
What Im looking for is a script that would compare to the two filesystems to make sure the bits match up and the number of files match up.
its around 2.8 million... (5 Replies)
Hi
I have some files that contain be anything up to 100k lines - eg. file100k
I have another file called file5k and I need to produce filec which will contain everything in file100k minus what matches in file 5k..
ie.
File100k contains
1FP
2FP
3FP
File5k contains
2FP
I would... (2 Replies)
Hi,
i have more than 1000 data files(.txt) like this
first file format:
178.83 554.545
179.21 80.392
second file:
178.83 990.909
179.21 90.196
etc.
I want to combine them to the following format:
178.83,554.545,990.909,...
179.21,80.392,90.196,... (7 Replies)
I want to tar large number of files about 150k.
i am using the find command as below to create a file with all file names.
& then trying to use the tar -I command as below.
# find . -type f -name "gpi*" > include-file
# tar -I include-file -cvf newfile.tar
This i got from one of the posts... (2 Replies)
Hellow i have a large number of files that i want to concatenate to one. these files start with the word 'VOICE_' for example
VOICE_0000000000
VOICE_1223o23u0
VOICE_934934927349
I use the following code:
cat /ODS/prepaid/CDR_FLOW/MEDIATION/VOICE_* >> /ODS/prepaid/CDR_FLOW/WORK/VOICE
... (10 Replies)
Hi. I need to delete a large number of files listed in a txt file. There are over 90000 files in the list. Some of the directory names and some of the file names do have spaces in them.
In the file, each line is a full path to a file:
/path/to/the files/file1
/path/to/some other/files/file 2... (4 Replies)
Hi All,
I have searched this forum for related posts but could not find one that fits mine. I have a shell script which removes all the XML tags including the text inside the tags from some 4 million XML files.
The shell script looks like this (MODIFIED):
find . "*.xml" -print | while read... (6 Replies)
Hi,
I have a large number of subdirectories (>200), and in each of these directories there is a file with a name like "opp1234.dat".
I'd like to know how I could change the names of these files to say "out.dat" in all these subdirectories in one go.
Thanks! (5 Replies)
Want to sftp large number of files ... approx 150 files will come to server every minute. (AIX box)
Also need make sure file has been sftped successfully...
Please let me know :
1. What is the best / faster way to transfer files?
2. should I use batch option -b so that connectivity will be... (3 Replies)
Discussion started by: vegasluxor
3 Replies
LEARN ABOUT NETBSD
mktemp
MKTEMP(1) BSD General Commands Manual MKTEMP(1)NAME
mktemp -- make temporary file name (unique)
SYNOPSIS
mktemp [-dqu] [-p tmpdir] {-t prefix | template ...}
DESCRIPTION
The mktemp utility takes each of the given file name templates and overwrites a portion of it to create a file name. This file name is
unique and suitable for use by the application. The template may be any file name with some number of 'Xs' appended to it, for example
/tmp/temp.XXXX. The trailing 'Xs' are replaced with the current process number and/or a unique letter combination. The number of unique
file names mktemp can return depends on the number of 'Xs' provided; six 'Xs' will result in mktemp testing roughly 26 ** 6 combinations.
If mktemp can successfully generate a unique file name, the file is created with mode 0600 (unless the -u flag is given) and the filename is
printed to standard output.
If the -t prefix option is given, mktemp will generate a template string based on the prefix and the TMPDIR environment variable, if set.
The default location if TMPDIR is not set is /tmp. The default location of the temporary directory can be overridden with the -p tmpdir
option. The template string created will consist of the prefix followed by a '.' and an eight character unique letter combination. 'Xs' in
the prefix string will be treated as literal. If an additional template argument is passed, a second file will be created. Care should be
taken to ensure that it is appropriate to use an environment variable potentially supplied by the user.
Any number of temporary files may be created in a single invocation using multiple template arguments, also a single one based on the inter-
nal template with the -t option value as filename prefix.
At least one template argument or the -t option must be present.
mktemp is provided to allow shell scripts to safely use temporary files. Traditionally, many shell scripts take the name of the program with
the pid as a suffix and use that as a temporary file name. This kind of naming scheme is predictable and the race condition it creates is
easy for an attacker to win. A safer, though still inferior, approach is to make a temporary directory using the same naming scheme. While
this does allow one to guarantee that a temporary file will not be subverted, it still allows a simple denial of service attack. For these
reasons it is suggested that mktemp be used instead.
OPTIONS
The available options are as follows:
-d Make a directory instead of a file.
-q Fail silently if an error occurs. This is useful if a script does not want error output to go to standard error.
-t prefix
Generate a template (using the supplied prefix and TMPDIR if set) to create a filename template. If -t prefix and template are both
given, prefix will not apply to template.
-u Operate in ``unsafe'' mode. The temp file will be unlinked before mktemp exits. This is slightly better than mktemp(3) but still
introduces a race condition. Use of this option is not encouraged.
EXIT STATUS
The mktemp utility exits with a value of 0 on success, and 1 on any failure.
EXAMPLES
The following sh(1) fragment illustrates a simple use of mktemp where the script should quit if it cannot get a safe temporary file.
TMPFILE=`mktemp /tmp/${0##*/}.XXXXXX` || exit 1
echo "program output" >> $TMPFILE
To allow the use of $TMPDIR:
TMPFILE=`mktemp -t ${0##*/}` || exit 1
echo "program output" >> $TMPFILE
In this case, we want the script to catch the error itself.
TMPFILE=`mktemp -q /tmp/${0##*/}.XXXXXX`
if [ $? -ne 0 ]; then
echo "$0: Can't create temp file, exiting..."
exit 1
fi
SEE ALSO mkdtemp(3), mkstemp(3), mktemp(3), environ(7)HISTORY
The mktemp utility appeared in NetBSD 1.5. It has been imported from FreeBSD, the idea and the manual page were taken from OpenBSD.
BSD August 15, 2009 BSD