Network interface status: command

[zep]

On 11/23/2017 09:22 AM, Ernie Luzar wrote:
> In the daily run status report I see a "Network interface status:"
> display.
>
> What console command is generating it?
>
tl;dr -- netstat with a couple options i & d.

I'd never really noticed it; it probably would be helpful to put the
output just to make sure things are lining up, and rather than just hand
you what I think is going on, this seems like a good time to teach
people what little I know of fishing.
if the email you're seeing is part of a daily run, it's set by the
system and not something you put in as root user (you can do crontab -l
as root to verify it's not there), then there's the system cron file in
/etc/crontab

# Perform daily/weekly/monthly maintenance.
1    3    *    *    *    root    periodic daily
15    4    *    *    6    root    periodic weekly
30    5    1    *    *    root    periodic monthly

that seems like a pretty good suspect, man on 'periodic'  -

     If an argument is an absolute directory name it is used as is,
otherwise
     it is searched for under /etc/periodic and any other directories speci-
     fied by the local_periodic setting in periodic.conf(5) (see below).

check the directories

root at nexus:/etc/periodic/daily # ls
100.clean-disks        330.news        440.status-mailq
110.clean-tmps        400.status-disks    450.status-security
120.clean-preserve    401.status-graid    460.status-mail-rejects
130.clean-msgs        404.status-zfs        480.leapfile-ntpd
140.clean-rwho        406.status-gmirror    480.status-ntpd
150.clean-hoststat    407.status-graid3    500.queuerun
200.backup-passwd    408.status-gstripe    510.status-world-kernel
210.backup-aliases    409.status-gconcat    800.scrub-zfs
300.calendar        420.status-network    999.local
310.accounting        430.status-rwho

that 420.status-network seems like a good candidate

root at nexus:/etc/periodic/daily # sh -x 420.status-network

...

+ echo 'Network interface status:'
Network interface status:
+ flags=-d
+ netstat -i -d
Name    Mtu Network       Address              Ipkts Ierrs Idrop   
Opkts Oerrs  Coll  Drop
em0    1500 <Link#1>      XXX  22874340     0     0   574773     0    
0     0
em0       - 192.168.XX.0/ nexus              1172609     -     -  
540898     -     -     -
lo0   16384 <Link#2>                            3749     0     0    
3749     0     0     0
lo0       - localhost     ::1                      0     -     -       
0     -     -     -
lo0       - fe80::1%lo0   fe80::1%lo0              0     -     -       
0     -     -     -
lo0       - your-net      localhost             3749     -     -    
3749     -     -     -
+ rc=0

and I think you'd find that's a decent match for what you get in your email.

...


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