Package: at
Version: at-3.1.16-r1 (gentoo), 3.1.14-1ubuntu1
$ echo echo | at now + 1 minute # works
warning: commands will be executed using /bin/sh
job 5 at Fri Nov 20 02:24:00 2015
[OK]
02:23j@acer ~
$ echo echo | at now + 1 second
syntax error. Last token seen: s
Garbled time
[ERR]
02:23j@acer ~
$ echo echo | at now + 1 seconds
syntax error. Last token seen: s
Garbled time
[ERR]
02:23j@acer ~
$ echo echo | at now + 1 s
syntax error. Last token seen: s
Garbled time
[ERR]
02:23j@acer ~
$ echo echo | at now + 1
syntax error. Last token seen: 1
Garbled time
[ERR]
02:23j@acer ~
$
Tested on Gentoo (up-to-date) and Ubuntu Trusty.
Looks "now + N second" format is not supported.
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