Bash Script help

[expandables]

Hi i have a script that deletes files in 30 days it works but i want to know how can i delete a file on a specific date .

Code: Select all

#!/bin/sh
 find /home/pi/delete/*.log -mtime +30  -exec rm {} \;

[MarkHaysHarris777]

Hi i have a script that deletes files in 30 days it works but i want to know how can i delete a file on a specific date .

Its better to rotate your log files rather than deleting them; then, maybe after so many rotations (or so many weeks) delete the oldest rotation.

[DougieLawson]

Code: Select all

#!/bin/sh
 find /home/pi/delete/*.log -mtime +30  -exec rm {} \;

touch -t 201506010000 /home/pi/delete/filetime # June 1st @ midnight
find /home/pi/delete/*.log -type f ! -newer /home/pi/delete/filetime -delete
rm /home/pi/delete/filetime

You'll need to test that on a cp -a copy of your directory.

[expandables]

Ok thanks that's what i wanted but any clue why i need to do cp -a compare to just doing cp?

[rpdom]

cp -a will preserve all the timestamps and permissions on the files. No point in testing using files where the timestamp has been changed.

It'll also copy any sub-directories, but I don't think that's needed in this case.

[Joe Schmoe]

"cp -a" is the general "big kahuna" version of "cp", that is the general solution to "How do I correctly copy a subdirectory tree?" So, it is worth learning and understanding.

However, in this specific case, all you really need is "-p", which just preserves the timestamps (which is all we care about in this specific instance).

BTW, "-a" is not standard (I'd wager it is Linux-only, but someone will probably come along and nitpick that). I often get caught trying to use it on, e.g., OSX, where it doesn't work - so, you have to drop back to "-p" (which is standard).

[expandables]

How can i do a script that checks if 30 days has pass from a specific date and then delete a file?

[Joe Schmoe]

How can i do a script that checks if 30 days has pass from a specific date and then delete a file?

I suppose something along the lines of:

$ touch -d '2014-12-25 30 days' /tmp/glozi
$ ls -lsa /tmp/glozi
0 -rw-r--r-- 1 pi pi 0 Jan 24 00:00 /tmp/glozi
$ find -newer /tmp/glozi ...

At least I think that's what you are getting at...

[rpdom]

Hmm, quite easy I guess.

Code: Select all

#!/bin/bash

now=$( date +%s)
then="2015-05-31"
testdate=$( date -d "$then + 30 days" +%s )
if [ $now -gt $testdate ]
then
  echo "Now is more than 30 days from $then"
fi

[expandables]

Thanks rpdom it works