Description:

Invalid log file name in atop.service file.
Log file should contain timestamp as year-month-day triplet.
Now atop.service contains this line:

ExecStart=/bin/sh -c '/usr/bin/atop -a -w /var/log/atop/atop_$(date +%Y%m%d) 600'

Which produces the following command (systemctl status atop.service):

CGroup: /system.slice/atop.service
└─2495 /usr/bin/atop -a -w /var/log/atop/atop_2014ba7a28bdbd8743ac910d282ea4153d3523 600

According to systemd.unit docs '%m' string is replaced with machine id (ba7a28bdbd8743ac910d282ea4153d35 in my case):

"%m" Machine ID The machine ID of the running system, formatted as string. See machine-id(5) for more information.

from (http://www.freedesktop.org/software/systemd/man/systemd.unit.html).

To fix it one should double all percent signs in the command from atop.service, so the command should look like:

ExecStart=/bin/sh -c '/usr/bin/atop -a -w /var/log/atop/atop_$(date +%%Y%%m%%d) 600'

Now only '%m' has special meaning in systemd service files, but given they use percent-letter format for different
placeholder, one should consider risk of stumbling upon future changes in systemd, so all percent signs should be
double in this case.

Please fix it in package ASAP. Thank you.

Additional info:
* package version(s): 2.0.2-1