Very Computer

Hi

How can I change the modified date/time of a file to a past/future
time?  Is there a shell command or utility available in Solaris or HP-UX
to do that?  I only know "touch" that updates the file modified
date/time to the current time only, not to a specific past/future time.

Hon-Chi

touch -t ????

zhang

Well, maybe I don't know how our sys admin installs it.  :^)FYI, I'm using
Solaris 2.5.1

  > man touch
    ...
  SYNOPSIS
       touch [-acm] [-r ref_file] file...
       touch [-acm] [-t time] file...
       touch [-acm] [date_time] file...

But
  > touch -t 01011200 MyFile
  usage: touch [-amcf] file ...

  > which touch
  /usr/bin/touch

If
  > man -s 1b touch
    ...
  SYNOPSIS
       /usr/ucb/touch [-acfm] file...Obviously, my "touch" command and its
manpage don't match.  :^(

Which is the default "touch" in Solaris 2.5.1?  Where can I  get the "touch"
for Solaris 2.5.1 that allows me to set a specific time/date stamp, as
described in the manpage?

Quote:> # date/time to the current time only, not to a specific past/future time.
> #
> # Hon-Chi

Hon-Chi

So am I.

Quote:>   > man touch
>     ...
>   SYNOPSIS
>        touch [-acm] [-r ref_file] file...
>        touch [-acm] [-t time] file...
>        touch [-acm] [date_time] file...

Yeah. That's what I get.

Quote:> But
>   > touch -t 01011200 MyFile
>   usage: touch [-amcf] file ...

Nope. Don't get the usage message, but...

ls -l MyFile
-rw-rw-r--   1 bonzo    mygroup        0 Jan  1 12:00 MyFile

Quote:>   > which touch
>   /usr/bin/touch

which touch
/bin/touch

BUT...

ls -ld /bin
lrwxrwxrwx   1 radix    radix         9 Sep 20  1996 /bin -> ./usr/bin/

so /bin/touch is identical to /usr/bin/touch

Quote:> If
>   > man -s 1b touch
>     ...
>   SYNOPSIS
>        /usr/ucb/touch [-acfm] file...Obviously, my "touch" command and
> its manpage don't match.  :^(

Looks like your sysadmin has stuck the UCB touch in your bin directory.
That may be an installation option. You will have to speak to them.

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Quote:> so /bin/touch is identical to /usr/bin/touch

Yup, cos /bin is a link to /usr/bin!  This holds true on most UNIX's!
Well, at least Solaris, HP-UX, IRIX, Digital from what I know.  I think
that at least HP have plans to obliterate this link in future releases so
one should always refer to /usr/bin in scripts, as opposed to /bin.  A bit
off the topic but worth mentioning.

AK

Hows about 'touch -m -t <timestamp> <file>'. It would appear
that you need to tell touch whether to modify the accessed date,
created date, or modified date, as well as the desired timestamp.

Quote:> How can I change the modified date/time of a file

  "settime" or "touch"

  Note that one particular option:

    settime -f fromfile tofile

  _copies_ a mod time from file to file,
  in case that's useful.

  The "-p" option of "cp" also copies mod times while copying files,
  in case that's also useful.

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