CentOS - May 2019 - how to find out the number of updates for a system

Hallo,
I need the information how many updates are available for a system.
What is the best way to find it out in a one line bash script.

Von meinem iPad gesendet

Ralf Prengel wrote:
> Hallo,
> I need the information how many updates are available for a system.
> What is the best way to find it out in a one line bash script.
>
yum check-update, perhaps?

      mark

Hey Mark,

one quick and dirty possibility:

a=`yum check-updates | awk '{ print $2 }' |grep -v ":" |grep
-v mirror |wc
-l` ; echo $(($a - 1))


Best regards

Steffen

yum check-updates 2>/dev/null|grep -A1000 "^$"|grep -vc
"^$"

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro

----- Original Message -----
> From: "Ralf Prengel" <ralf.prengel at rprengel.de>
> To: "CentOS mailing list" <centos at centos.org>
> Sent: Wednesday, 22 May, 2019 14:42:53
> Subject: [CentOS] how to find out the number of updates for a system
> Hallo,
> I need the information how many updates are available for a system.
> What is the best way to find it out in a one line bash script.
> 
> Von meinem iPad gesendet
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos

Once upon a time, mark <m.roth at 5-cent.us> said:
> Ralf Prengel wrote:
> > Hallo,
> > I need the information how many updates are available for a system.
> > What is the best way to find it out in a one line bash script.
> >
> yum check-update, perhaps?
Note that "yum check-update" or "yum list updates" won't
tell you how
many packages would be installed with "yum update"... dependencies and
such are not resolved for check-update/list updates.

-- 
Chris Adams <linux at cmadams.net>

You might want to increase 1000 if you expect to have more than that number of
updates :)

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro

----- Original Message -----
> From: "Nux!" <nux at li.nux.ro>
> To: "CentOS mailing list" <centos at centos.org>
> Sent: Wednesday, 22 May, 2019 15:48:00
> Subject: Re: [CentOS] how to find out the number of updates for a system
> yum check-updates 2>/dev/null|grep -A1000 "^$"|grep -vc
"^$"
> 
> --
> Sent from the Delta quadrant using Borg technology!
> 
> Nux!
> www.nux.ro
> 
> ----- Original Message -----
>> From: "Ralf Prengel" <ralf.prengel at rprengel.de>
>> To: "CentOS mailing list" <centos at centos.org>
>> Sent: Wednesday, 22 May, 2019 14:42:53
>> Subject: [CentOS] how to find out the number of updates for a system
> 
>> Hallo,
>> I need the information how many updates are available for a system.
>> What is the best way to find it out in a one line bash script.
>> 
>> Von meinem iPad gesendet
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
> > https://lists.centos.org/mailman/listinfo/centos

maybe
  yum -q check-update | wc -l

On 5/22/19 8:42 AM, Ralf Prengel wrote:
> Hallo,
> I need the information how many updates are available for a system.
> What is the best way to find it out in a one line bash script.
> 
> Von meinem iPad gesendet
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos
> 

-- 
-- Steve

Nice one, -q
However that command will still count an empty line that yum outputs, even with
-q; it could also create problems due to stderr. I'd use something like:
yum -q check-update 2>/dev/null|grep -c -v ^$

--
Sent from the Delta quadrant using Borg technology!

Nux!
www.nux.ro

----- Original Message -----
> From: "SternData" <subscribed-lists at sterndata.com>
> To: "CentOS mailing list" <centos at centos.org>
> Sent: Wednesday, 22 May, 2019 16:03:39
> Subject: Re: [CentOS] how to find out the number of updates for a system
> maybe
>  yum -q check-update | wc -l
> 
> On 5/22/19 8:42 AM, Ralf Prengel wrote:
>> Hallo,
>> I need the information how many updates are available for a system.
>> What is the best way to find it out in a one line bash script.
>> 
>> Von meinem iPad gesendet
>> _______________________________________________
>> CentOS mailing list
>> CentOS at centos.org
>> https://lists.centos.org/mailman/listinfo/centos
>> 
> 
> 
> --
> -- Steve
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> https://lists.centos.org/mailman/listinfo/centos