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When I execute this :

at 7:43 -f

I get this :

warning: commands will be executed using /bin/sh
Cannot open lockfile /var/spool/cron/atjobs/.SEQ: No such file or directory

So what I'm doing wrong? What's wrong with the command?

How do I fix this error?

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I found this that solved the problem – Mazal Sep 12 '13 at 9:32
so the link is dead and you didn't provide explanations ... not funny! – Stefano Mtangoo Oct 9 '14 at 13:58

Try this.

The warning comes up when the user's shell is not /usr/bin/sh. So just change your login shell to /usr/bin/sh.

Just press Ctrl+Alt+T on your keyboard to open Terminal. When it opens, run the command(s) below:

chsh -s /bin/sh $USER
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