[Klug-general] Bash script to delete folders if they exists (revisited)

[Nathan Friend]

Thanks David for the staring point.  Got it working now, here it is:

#!/bin/bash
for MYDIR in `find  /Users/ -type d | sed '1d' | grep -v -F -f tokeep.txt`
do
  rm -vrf $MYDIR
done

Added a sed '1d' to cut out the current directory from the find results.
 Also added -F so grep interprets the source file pattern as fix strings.

Cheers,

Nathan.


On Mon, Aug 8, 2011 at 10:43 AM, David Halliday <david.halliday at gmail.com>wrote:

> Look again at my example. I use the "grep -v" to negate the behaviour of
> grep
>
> $ more file.txt
> foo
> bar
> abc
>
> $ grep "foo" file.txt
> foo
>
> $ grep -v "foo" file.txt
> bar
> abc
>
>
> On 7 August 2011 22:30, Nathan Friend <nathan.friend at gmail.com> wrote:
>
>> Hello KLUG,
>> Looking at this again now.  So my list file "dir_list" contains all
>> the directory's I want to preserve e.g.
>>
>> /Users/administrator
>> /Users/user1
>> /Users/user5
>>
>> How could I script to delete all directory's in /Users/* excluding the
>> ones in dir_list.  David's suggestion of using the find command to generate
>> a list file of the current /Users/* contents is OK, but how do I use this to
>> compare against the exclusion list?
>>
>> Cheers,
>>
>> Nathan.
>>
>>
>> On Fri, Jul 15, 2011 at 11:04 PM, Nathan Friend <nathan.friend at gmail.com>wrote:
>>
>>> mmmm OK that's an interesting idea.  So the first part of the script
>>> builds the contents of the exclusion file...
>>>
>>> Cheers,
>>>
>>> Nathan.
>>>
>>>
>>> On Fri, Jul 15, 2011 at 6:49 PM, David Halliday <
>>> david.halliday at gmail.com> wrote:
>>>
>>>>
>>>> why not create the list using the find command.
>>>>
>>>> find directories matching pattern: find -type d -name fred*
>>>> then pipe the output into grep: grep -v -f myFilesToKeep.txt
>>>>
>>>> Using -v reverses the output so it only outputs lines that aren't in the
>>>> list (one per line).
>>>>
>>>> so:
>>>> amon at amon1:~$ find / -maxdepth 1 -type d
>>>> /
>>>> /srv
>>>> /sbin
>>>> /var
>>>> /selinux
>>>> /cdrom
>>>> /lib32
>>>> /media
>>>> /home
>>>> /sys
>>>> /tmp
>>>> /mnt
>>>> /opt
>>>> /dev
>>>> /usr
>>>> /root
>>>> /bin
>>>> /boot
>>>> /etc
>>>> /lost+found
>>>> /lib
>>>> /proc
>>>> amon at amon1:~$ more myFilesToKeep.txt
>>>> tmp
>>>> sys
>>>> amon at amon1:~$ find / -maxdepth 1 -type d | grep -v -f
>>>> myFilesToKeep.txt
>>>> /
>>>> /srv
>>>> /sbin
>>>> /var
>>>> /selinux
>>>> /cdrom
>>>> /lib32
>>>> /media
>>>> /home
>>>> /mnt
>>>> /opt
>>>> /dev
>>>> /usr
>>>> /root
>>>> /bin
>>>> /boot
>>>> /etc
>>>> /lost+found
>>>> /lib
>>>> /proc
>>>>
>>>> so:
>>>>
>>>> for MYDIR in `find / -maxdepth 1 -type d | grep -v -f myFilesToKeep.txt
>>>> `
>>>> do
>>>>   rm -rf $MYDIR
>>>> done
>>>>
>>>> *NOTE: Do not run this as is! unless you want to be left with only /tmp
>>>> and /sys on your system!*
>>>> *
>>>> *
>>>> But that's a starting point, play with the man pages for find and grep.
>>>>
>>>> On 15 July 2011 14:22, Nathan Friend <nathan.friend at gmail.com> wrote:
>>>>
>>>>> Afternoon KLUG,
>>>>> Last year I wanted a bash script to delete folders if they existed in
>>>>> a predefined list file.  The end result was:
>>>>>
>>>>> while read dir
>>>>> do
>>>>> if [ -d $dir ]
>>>>> then
>>>>> rm -R $dir
>>>>> echo "Directory $dir found and deleted."
>>>>> else
>>>>> echo "Directory $dir not found."
>>>>> fi
>>>>> done < dir_list
>>>>>
>>>>>
>>>>> dir_list file contains
>>>>> /Users/user1
>>>>> /Users/user2
>>>>> /Users/user3
>>>>>
>>>>> This year I need to delete all files in the /Users/ folder except the
>>>>> ones listed in dir_list.
>>>>>
>>>>> Any ideas?
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Nathan.
>>>>>
>>>>> _______________________________________________
>>>>> Kent mailing list
>>>>> Kent at mailman.lug.org.uk
>>>>> https://mailman.lug.org.uk/mailman/listinfo/kent
>>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Kent mailing list
>>>> Kent at mailman.lug.org.uk
>>>> https://mailman.lug.org.uk/mailman/listinfo/kent
>>>>
>>>
>>>
>>
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>
>
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