I think you got it right in the first place; looks more like moving than removal to me
The
is redundant, find will print the files one by one by default when not given -exec.
ls will always give single-column when printing to a non-terminal anyway. Try
-- because it's printing to a pipe and not a terminal, it gives single-column output.
Remove the 'echo' from in front of mv once you've tested that it really does what you want.
There's more efficient ways to get the filename and extension, but they may not be available in your shell; what is it?
Last edited by Corona688; 08-24-2011 at 11:45 AM..
Trying to use the find command to find any directory which contains a file ending in .zip AND a file ending in .o
I'm having trouble specifying multiple files as criteria and have can't seem to figure it out from Unix in a Nutshell and Google. (2 Replies)
Dear All
I am basic user of Unix.
i woul like to delete some files
(basically 05 and 0801111105) from unix directories but unable to delete it
I tried all option. rm , rm -f etc.. but not succeed.
Infact it also not allowing me to use chmod option so that i can grant 777 option to... (1 Reply)
Hi ppl.
I have to check for duplicate files in a directory .
the directory has following files
/the/folder /containing/the/file
a1.yyyymmddhhmmss
a1.yyyyMMddhhmmss
b1.yyyymmddhhmmss
b2.yyyymmddhhmmss
c.yyyymmddhhmmss
d.yyyymmddhhmmss
d.yyyymmddhhmmss
where the date time stamp can be... (1 Reply)
Hello
I'm new to this forum, so I did a quick scan of the FAQs to see if my problem had been addressed already, since I believe it is probably a very common need. I was surprised that I did not see anything obvious.
I need to remove all files from a directory that have a last modified date... (2 Replies)
Hi
I have a problem. One of the directories in /var, on one of my servers, has filled up with loads of files. I have tried to list the directory to see what is in it, but the 'ls' command just hangs. Same thing happens when I try to use 'rm' to remove files from that directory.
I can see what... (2 Replies)
Hi all,
I have the following question. Considder that in the directory /code the script remove.pl exists. What i want is to run this script and remove some files that exist in the directory /dir/tmp. I use the below code but it does not work.
system("cd /dir/code");
system("rm FileName");
... (6 Replies)
I'm trying to remove several directories which contains sun-dirs and files inside.
I used the command rm -r <dirname>
But, it always ask "examine file in directory <dirname> yes/no?" line by line.
So, i need to write "y" for every line.
How can i skip this step and remove all directories with... (9 Replies)
I have some empty files that were created from a script I ran that I cannot delete using the rm command.... any ideas as how I can delete them?
-rw-r--r-- 1 schroeks x_exp 0 Jul 21 08:24 rrd15CEC
-rw-r--r-- 1 schroeks x_exp 0 Jul 21 11:37 rrd15CEC
-rw-r--r-- ... (20 Replies)
Hello,
I have several thousand files with different extensions in a directory. Is there a single command to get what the various extensions are with a single command.
Thanks for your help!
Best,
Guss (2 Replies)
Hi all.
Am doing continuous backup of mailboxes using rsync.
So whenever a new mail arrives it is automatically copied on backup server.
When a new mail arrives it is named as xyz:2, when it is read by the email client an S is appended xyz:2,S
Eventually , 2 copies of the same file exist on... (7 Replies)
Discussion started by: coolatt
7 Replies
LEARN ABOUT CENTOS
flock
FLOCK(1) User Commands FLOCK(1)NAME
flock - manage locks from shell scripts
SYNOPSIS
flock [options] <file|directory> <command> [command args]
flock [options] <file|directory> -c <command>
flock [options] <file descriptor number>
DESCRIPTION
This utility manages flock(2) locks from within shell scripts or the command line.
The first and second forms wrap the lock around the executing a command, in a manner similar to su(1) or newgrp(1). It locks a specified
file or directory, which is created (assuming appropriate permissions), if it does not already exist. By default, if the lock cannot be
immediately acquired, flock waits until the lock is available.
The third form uses open file by file descriptor number. See examples how that can be used.
OPTIONS -s, --shared
Obtain a shared lock, sometimes called a read lock.
-x, -e, --exclusive
Obtain an exclusive lock, sometimes called a write lock. This is the default.
-u, --unlock
Drop a lock. This is usually not required, since a lock is automatically dropped when the file is closed. However, it may be
required in special cases, for example if the enclosed command group may have forked a background process which should not be hold-
ing the lock.
-n, --nb, --nonblock
Fail rather than wait if the lock cannot be immediately acquired. See the -E option for the exit code used.
-w, --wait, --timeout seconds
Fail if the lock cannot be acquired within seconds. Decimal fractional values are allowed. See the -E option for the exit code
used.
-o, --close
Close the file descriptor on which the lock is held before executing command . This is useful if command spawns a child process
which should not be holding the lock.
-E, --conflict-exit-code number
The exit code used when the -n option is in use, and the conflicting lock exists, or the -w option is in use, and the timeout is
reached. The default value is 1.
-c, --command command
Pass a single command, without arguments, to the shell with -c.
-h, --help
Print a help message.
-V, --version
Show version number and exit.
EXAMPLES
shell1> flock /tmp -c cat
shell2> flock -w .007 /tmp -c echo; /bin/echo $?
Set exclusive lock to directory /tmp and the second command will fail.
shell1> flock -s /tmp -c cat
shell2> flock -s -w .007 /tmp -c echo; /bin/echo $?
Set shared lock to directory /tmp and the second command will not fail. Notice that attempting to get exclusive lock with second
command would fail.
shell> flock -x local-lock-file echo 'a b c'
Grab the exclusive lock "local-lock-file" before running echo with 'a b c'.
(
flock -n 9 || exit 1
# ... commands executed under lock ...
) 9>/var/lock/mylockfile
The form is convenient inside shell scripts. The mode used to open the file doesn't matter to flock; using > or >> allows the lock-
file to be created if it does not already exist, however, write permission is required. Using < requires that the file already
exists but only read permission is required.
[ "${FLOCKER}" != "$0" ] && exec env FLOCKER="$0" flock -en "$0" "$0" "$@" || :
This is useful boilerplate code for shell scripts. Put it at the top of the shell script you want to lock and it'll automatically
lock itself on the first run. If the env var $FLOCKER is not set to the shell script that is being run, then execute flock and grab
an exclusive non-blocking lock (using the script itself as the lock file) before re-execing itself with the right arguments. It
also sets the FLOCKER env var to the right value so it doesn't run again.
EXIT STATUS
The command uses sysexits.h return values for everything else but an options -n or -w failures which return either the value given by the
-E option, or 1 by default.
AUTHOR
H. Peter Anvin <hpa@zytor.com>
COPYRIGHT
Copyright (C) 2003-2006 H. Peter Anvin.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO flock(2)AVAILABILITY
The flock command is part of the util-linux package and is available from Linux Kernel Archive <ftp://ftp.kernel.org/pub/linux/utils/util-
linux/>.
util-linux September 2011 FLOCK(1)