08-23-2011
Quote:
Originally Posted by
shoaibjameel123
Hi All,
I have some 80,000 files in a directory which I need to rename. Below is the command which I am currently running and it seems, it is taking fore ever to run this command.
If you can install mmv, you can do
mmv '*.xml' '#1.dat' which will be faster than the version with parallel, because it doesn't need to run 80,000 separate instances of mv.
I don't think renaming 80,000 files is
ever going to be
fast, though. That's 80,000 file tree operations.
This User Gave Thanks to Corona688 For This Post:
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CMP(1) User Commands CMP(1)
NAME
cmp - compare two files byte by byte
SYNOPSIS
cmp [OPTION]... FILE1 [FILE2 [SKIP1 [SKIP2]]]
DESCRIPTION
Compare two files byte by byte.
-b --print-bytes
Print differing bytes.
-i SKIP --ignore-initial=SKIP
Skip the first SKIP bytes of input.
-i SKIP1:SKIP2 --ignore-initial=SKIP1:SKIP2
Skip the first SKIP1 bytes of FILE1 and the first SKIP2 bytes of FILE2.
-l --verbose
Output byte numbers and values of all differing bytes.
-n LIMIT --bytes=LIMIT
Compare at most LIMIT bytes.
-s --quiet --silent
Output nothing; yield exit status only.
-v --version
Output version info.
--help Output this help.
SKIP1 and SKIP2 are the number of bytes to skip in each file. SKIP values may be followed by the following multiplicative suffixes: kB
1000, K 1024, MB 1,000,000, M 1,048,576, GB 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z, Y.
If a FILE is `-' or missing, read standard input.
AUTHOR
Written by Torbjorn Granlund and David MacKenzie.
REPORTING BUGS
Report bugs to <bug-gnu-utils@gnu.org>.
COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc.
This program comes with NO WARRANTY, to the extent permitted by law. You may redistribute copies of this program under the terms of the
GNU General Public License. For more information about these matters, see the file named COPYING.
SEE ALSO
The full documentation for cmp is maintained as a Texinfo manual. If the info and cmp programs are properly installed at your site, the
command
info diff
should give you access to the complete manual.
diffutils 2.8.1 April 2002 CMP(1)