[gentoo-user] crontab backup

[gentoo-user] crontab backup

[Joseph]

I'm trying to backup crontab from various boxes to files, so I'm using (run once a month)
11 01 * * 5 crontab -l > /home/joseph/business/backup/crontabs/syscon7_joseph_crontab

but I can from bash: cannot overwrite existing file

-- 
Joseph

[gentoo-user] Re: crontab backup

[Jouni Kosonen]

Joseph wrote:

> I'm trying to backup crontab from various boxes to files, so I'm using
> (run once a month) 11 01 * * 5 crontab -l >
> /home/joseph/business/backup/crontabs/syscon7_joseph_crontab
> 
> but I can from bash: cannot overwrite existing file
> 

From "man bash":

   Redirecting Output
...
       If the redirection operator is >, and the noclobber option  to  the
       set builtin has been enabled, the redirection will fail if the file
       whose name results from the expansion of word exists and is a regu‐
       lar  file.   If  the redirection operator is >|, or the redirection
       operator is > and the noclobber option to the set  builtin  command
       is not enabled, the redirection is attempted even if the file named
       by word exists.


---
Jouni

Re: [gentoo-user] Re: crontab backup

[Joseph]

On 09/17/14 05:22, Jouni Kosonen wrote:
>Joseph wrote:
>
>> I'm trying to backup crontab from various boxes to files, so I'm using
>> (run once a month) 11 01 * * 5 crontab -l >
>> /home/joseph/business/backup/crontabs/syscon7_joseph_crontab
>>
>> but I can from bash: cannot overwrite existing file
>>
>
>From "man bash":
>
>   Redirecting Output
>...
>       If the redirection operator is >, and the noclobber option  to  the
>       set builtin has been enabled, the redirection will fail if the file
>       whose name results from the expansion of word exists and is a regu‐
>       lar  file.   If  the redirection operator is >|, or the redirection
>       operator is > and the noclobber option to the set  builtin  command
>       is not enabled, the redirection is attempted even if the file named
>       by word exists.

Yes, that worked. Thanks

-- 
Joseph

Re: [gentoo-user] crontab backup

[Neil Bothwick]

[-- Attachment #1: Type: text/plain, Size: 579 bytes --]

On Tue, 16 Sep 2014 19:30:36 -0600, Joseph wrote:

> I'm trying to backup crontab from various boxes to files, so I'm using
> (run once a month) 11 01 * * 5 crontab -l
> > /home/joseph/business/backup/crontabs/syscon7_joseph_crontab
> 
> but I can from bash: cannot overwrite existing file

Do you have noclobber in your shell options? If so, replace > with >| to
overwrite files. Or use tee, which will happily overwrite files with no
consideration of their type, content or importance :(


-- 
Neil Bothwick

Growing old is mandatory; growing up is optional!!

[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 181 bytes --]