touch
change file timestamps
Synopsis
touch
[OPTION]... FILE...
add an example, a script, a trick and tips
examples
Modify timestamp (YYMMDDhhmm):
touch -t 1311240733 file
example added by LeBerger
Modify timestamp (YYMMDDhhmm):
touch -t 1311240733 file
example added by LeBerger
source
touch palladius.it-todo.touch
source
How do I recursively touch files matching a pattern
With find:
find ~/docs -name "*.txt" -exec touch {} \;
- You search in
~/docs
- The
name option will match all txt
files - exec will execute the command
touch on the file name, which is substituted in
{}
-
\; ends the command and touch will be
called once for each file found
Note:
- A slight variation,
\+ at the end constructs one
single command to run touch on all of these files at
once. This is not possible with all commands, but it works for
touch and saves you a few calls if you have a lot of
files that are affected.
source
Touch Change Access, Modify AND Change
The what? The modified time is the time the file was last
changed.
$ touch test
$ stat test
File: `test'
Size: 749 Blocks: 8 IO Block: 4096 regular file
Device: fd01h/64769d Inode: 33 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ me) Gid: ( 1000/ me)
Access: 2012-03-06 18:43:19.000000000 -0600
Modify: 2012-03-06 18:43:19.000000000 -0600
Change: 2012-03-06 18:43:19.000000000 -0600
$ touch test
$ stat test
File: `test'
Size: 749 Blocks: 8 IO Block: 4096 regular file
Device: fd01h/64769d Inode: 33 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ me) Gid: ( 1000/ me)
Access: 2012-03-06 18:43:23.000000000 -0600
Modify: 2012-03-06 18:43:23.000000000 -0600
Change: 2012-03-06 18:43:23.000000000 -0600
source
How can I change the creation time of all a folder's files to the current time?
Navigate to the folder in question, let's say,
~/Documents/myfiles.
$ cd ~/Documents/myfiles
Then do:
$ touch *
This will change the modification time to whenever you executed
that command.
Obviously you can make this more specific depending on your use
case, e.g.
$ touch *.doc
will only alter the modification time for files with the string
'.doc' in their name.
source
Debian - LAMP Install
That command creates an empty file called "info.php". The next
step is probably to edit the file, and add something like this to
it:
<?php phpinfo();
What this does is allow you to see all information about your
Apache/PHP installation through your browser, usually to see if
you have all the PHP libraries you need.
When you have done installing, you should delete "info.php".
source
time stamp XXXX s in the future issue - touch command (Linux)
It did not work because you changed the timestamp of the
archive, not of the files it contains. If you run
stat on the tar.gz file you will find
that the time was changed correctly. touch cannot
access the files stored within the archive until you extract them
so they were left unchanged.
In any case, this should not be a problem, just untar the
archive, then change the timestamp of the files:
mkdir foo
mv openssl-1.0.1e.tar.gz foo/
cd foo/
tar xvvzf openssl-1.0.1e.tar.gz
find . -exec touch -am '{}' \;
source
Recursively touching directories' last modified datetime as the same datetime of the last modified file inside
Maybe something like this:
find . -type d -print0 | while read -r -d '' dir; do file="$(find "$dir" -maxdepth 1 -type f -printf '%T+ %p\n' | sort -r | head -1 | cut -d' ' -f2-)";if [ -n "$file" ]; then touch "$dir" -mr "$file"; fi; done
Explanation:
To pass modification date from one file to another we have to
run:
touch file1 -mr file2
First we have to find subdirectories:
find . -type d -print0 | while read -r -d '' dir; do echo "$dir"; done
In this case -exec option would get too complex so I
use while-read approach. You need to make sure to pipe the output
from find with NUL as record separator,
and tell read to split on that (-d '').
To find files with last modification date I can use:
find ./ -maxdepth 1 -type f -printf '%T+ %p\n' | sort -r | head -1 | cut -d' ' -f2-
Combining it:
find . -mindepth 1 -type d -print0 | while read -r -d '' dir; do file="$(find "$dir" -maxdepth 1 -type f -printf '%T+ %p\n' | sort -r | head -1 | cut -d' ' -f2-)";echo "$dir <- $file"; done
Finally, adding touch:
find . -mindepth 1 -type d -print0 | while read -r -d '' dir; do file="$(find "$dir" -maxdepth 1 -type f -printf '%T+ %p\n' | sort -r | head -1 | cut -d' ' -f2-)";touch "$dir" -mr "$file"; done
I use -mindepth option here because I launched this
command from directory containing dir_a which does not have any
file to read date from. To eliminate this problem I can use
if-else to ensure i do not try to read time from non existing
file:
find . -type d -print0 | while read -r -d '' dir; do file="$(find "$dir" -maxdepth 1 -type f -printf '%T+ %p\n' | sort -r | head -1 | cut -d' ' -f2-)";if [ -n "$file" ]; then touch "$dir" -mr "$file"; fi; done
source
Linux weird problem touch : command not found?
Try the following command:
type touch
It may tell you that the touch command is at
/usr/bin/touch and if so:
/usr/bin/touch ...
source
How do I add permissions to my tomcat.sh?
The simple answer to this is probably that you need to start the
Tomcat service as root. Try sudo tomcat start
instead (assuming that tomcat start is correct);
that will run the starter process as root.
It's either that, or you aren't executing what you think you are.
Remember that in Linux, you must give the full name of the file
you want to execute; tomcat and
tomcat.sh are distinctly different. This is because
unlike on Windows, file extensions in Linux (and other Unixes)
are essentially devoid of meaning to the OS.
description
Update the
access and modification times of each FILE to the current
time.
A FILE argument
that does not exist is created empty, unless -c
or -h is supplied.
A FILE argument
string of - is handled specially and causes touch to
change the times of the file associated with standard
output.
Mandatory
arguments to long options are mandatory for short options
too.
-a
change only the access time
-c,
--no-create
do not create any files
-d,
--date=STRING
parse STRING and use it instead
of current time
-h,
--no-dereference
affect each symbolic link
instead of any referenced file (useful only on systems that
can change the timestamps of a symlink)
-m
change only the modification time
-r,
--reference=FILE
use this file’s times
instead of current time
-t STAMP
use [[CC]YY]MMDDhhmm[.ss]
instead of current time
--time=WORD
change the specified time: WORD
is access, atime, or use: equivalent to -a WORD
is modify or mtime: equivalent to -m
--help
display this help and exit
--version
output version information and
exit
Note that the
-d and -t options accept different
time-date formats.
copyright
Copyright © 2012 Free Software Foundation, Inc. License GPLv3+:
GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute
it. There is NO WARRANTY, to the extent permitted by law.
date string
The --date=STRING is a mostly free format human readable date
string such as "Sun, 29 Feb 2004 16:21:42 -0800" or "2004-02-29
16:21:42" or even "next Thursday". A date string may contain
items indicating calendar date, time of day, time zone, day of
week, relative time, relative date, and numbers. An empty string
indicates the beginning of the day. The date string format is
more complex than is easily documented here but is fully
described in the info documentation.
reporting bugs
Report touch bugs to bug-coreutils[:at:]gnu[:dot:]org
GNU coreutils home page:
<http://www.gnu.org/software/coreutils/>
General help using GNU software:
<http://www.gnu.org/gethelp/>
Report touch translation bugs to
<http://translationproject.org/team/>
see also
The full
documentation for touch is maintained as a Texinfo
manual. If the info and touch programs are
properly installed at your site, the command
info
coreutils 'touch invocation'
should give you
access to the complete manual.
author
Written by Paul
Rubin, Arnold Robbins, Jim Kingdon, David MacKenzie, and
Randy Smith.