greetings,
is it a proper way and/or good idea to perform a yum update in the background like this?
yum -y update &
at this moment, i do not have as reliable of an "wireless access connection" to the remote server machine at the data center as i would like and i want to take this one box from 4.1 to latest 4.2
comments please?
thanks!
- rh
-- Robert Hanson - Abba Communications Computer & Internet Services www.abbacomm.net
greetings,
is it a proper way and/or good idea to perform a yum update in the background like this?
yum -y update &
at this moment, i do not have as reliable of an "wireless access connection" to the remote server machine at the data center as i would like and i want to take this one box from 4.1 to latest 4.2
use screen or nohup?
-Mike
On Wed, 2005-10-19 at 10:54 -0600, mbest@pendragon.org wrote:
greetings,
is it a proper way and/or good idea to perform a yum update in the background like this?
yum -y update &
at this moment, i do not have as reliable of an "wireless access connection" to the remote server machine at the data center as i would like and i want to take this one box from 4.1 to latest 4.2
use screen or nohup?
I would vote for screen myself.
Paul
On Oct 19, 2005, at 1:03 PM, Robert wrote:
greetings,
is it a proper way and/or good idea to perform a yum update in the background like this?
yum -y update &
at this moment, i do not have as reliable of an "wireless access connection" to the remote server machine at the data center as i would like and i want to take this one box from 4.1 to latest 4.2
comments please?
thanks!
- rh
-- Robert Hanson - Abba Communications Computer & Internet Services www.abbacomm.net
Use screen.
http://jmcpherson.org/screen.html http://gentoo-wiki.com/TIP_Using_screen
Michael Grinnell Network Security Administrator The American University e-mail: grinnell@american.edu
} > } } Use screen. } } http://jmcpherson.org/screen.html } http://gentoo-wiki.com/TIP_Using_screen
im following your theory on recommendation yet not following based upon my scenario right now.
maybe i should clarify...
i am ssh'ing into a bash shell on a CentOS 4.1 server at a datacenter. it is just a backup dns server and so if i lose after a reboot, ill be ok.
my access connection can go up and down at times so i was hoping that i could do a
yum -y update &
and later just come back and reboot it into 4.2
good idea or not? if not, please explain and thanks
if i have to, ill install screen, yet will this simple yum update idea work???
- rh
-- Robert Hanson - Abba Communications Computer & Internet Services www.abbacomm.net
On Oct 19, 2005, at 1:53 PM, Robert wrote:
} > } } Use screen. } } http://jmcpherson.org/screen.html } http://gentoo-wiki.com/TIP_Using_screen
im following your theory on recommendation yet not following based upon my scenario right now.
maybe i should clarify...
i am ssh'ing into a bash shell on a CentOS 4.1 server at a datacenter. it is just a backup dns server and so if i lose after a reboot, ill be ok.
my access connection can go up and down at times so i was hoping that i could do a
yum -y update &
and later just come back and reboot it into 4.2
good idea or not? if not, please explain and thanks
if i have to, ill install screen, yet will this simple yum update idea work???
- rh
-- Robert Hanson - Abba Communications Computer & Internet Services www.abbacomm.net
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Your basic scenario would be:
1) ssh into server 2) start screen 3) yum update 4) detach screen (yum continues in background) ... 5) ssh into server again 6) reattach screen 7) check status of yum process, check errors, etc. 8) once yum is finished, reboot
The advantage of doing this with screen is that even if your ssh connection dies in the middle of typing a command, you can ssh back into the server, reattach the screen, and be right where you left off.
I can't really speak to the wisdom of yum -y update & as I always like to know what questions it asks me before I say yes or no.
I hope this was the answer you were looking for,
Michael Grinnell Network Security Administrator The American University e-mail: grinnell@american.edu
On Wed, 2005-10-19 at 12:53, Robert wrote:
maybe i should clarify...
i am ssh'ing into a bash shell on a CentOS 4.1 server at a datacenter. it is just a backup dns server and so if i lose after a reboot, ill be ok.
my access connection can go up and down at times so i was hoping that i could do a
yum -y update &
and later just come back and reboot it into 4.2
good idea or not? if not, please explain and thanks
An assortment of things will break between the time the update happens and the reboot. I'm not sure what, but at least my cacti graphs stopped updating and web services stopped working.
if i have to, ill install screen, yet will this simple yum update idea work???
With screen you wouldn't put it in the background. If you have several machines in the location with reliable connections between them you would only have to run screen on one of them with ssh sessions out to the others and you'd still be able to disconnect and reconnect. I prefer to do this from a box running X with vnc enabled, but you get the same effect of being able to get back to long-running commands.
} } With screen you wouldn't put it in the background. If you } have several machines in the location with reliable connections } between them you would only have to run screen on one of them } with ssh sessions out to the others and you'd still be able } to disconnect and reconnect. I prefer to do this from a box } running X with vnc enabled, but you get the same effect of being } able to get back to long-running commands. }
well, i am novice at screen. havent used for over a decade
i did this
screen
then i did this
screen yum update
answered y
watched it. of course about 3/4 of way through i lost connectivity briefly on wireless.
it completed fine.
i ssh'd back in and rebooted
and now am back in and
[root@ns2 ~]# cat /etc/redhat-release CentOS release 4.2 (Final)
thanks for help!
thing is, i need to learn how to make a new screen and be able to attach back to it as i wasnt able o attach to this one even though it was still there till done and went away.
thanks again
- rh
-- Robert Hanson - Abba Communications Computer & Internet Services www.abbacomm.net
I would use:
nohup yum -y update &
and walk away
P.
Maciej Z.enczykowski wrote:
thing is, i need to learn how to make a new screen and be able to attach back to it as i wasnt able o attach to this one even though it was still there till done and went away.
"screen -r" to reattach or "screen -d -r" to detach another connection and reattach here.
Cheers, MaZe. _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
On 20/10/05, Maciej Żenczykowski maze@cela.pl wrote:
thing is, i need to learn how to make a new screen and be able to attach back to it as i wasnt able o attach to this one even though it was still there till done and went away.
"screen -r" to reattach or "screen -d -r" to detach another connection and reattach here.
Yep, that's pretty much it.
# Run screen screen
# Do stuff stuff
# Then "detach" (the meta key's usually CTRL) CTRL-a d <--- This detaches from your session but leaves it running
# SSH back to the system then re-attach screen -r
It's all pretty well explained and documented in the Gentoo Wiki as someone earlier posted. http://gentoo-wiki.com/TIP_Using_screen#First_steps
Will.
-
Les Mikesell -
Maciej Żenczykowski -
mbest＠pendragon.org -
Michael Grinnell -
Paul -
Peter Farrow -
Robert -
Will McDonald