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

[Nathan Friend]

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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