Date: Wed, 20 Apr 2005 03:48:16 -0700 (PDT) From: "Mars G. Miro" <marsgmiro@yahoo.com> To: freebsd-stable@freebsd.org Subject: Re: Newbie Question About System Update Message-ID: <20050420104816.23380.qmail@web60124.mail.yahoo.com>
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>> Fact is, trying to update a running system could result in silent failures. >> The system can not replace programs that are in use, so there's always the >> chance that something or other won't get updated (cron would be an excellent >> example ... do you always shut cron off when you update? How about >syslogd?) >Actually, it can. install goes to great lengths to make sure that it >carefully moves the executable out of the way before replacing it. It >won't go away until the last process to be executing out of it goes >away. >> That being said, I quite often do installworld on running systems because I >> have no way to go to single-user mode. It almost always works well enough >> for my purposes, but I don't want anyone to think that it's "OK" to do this, >> as it's not guaranteed to work, and will most likely result in some programs >> not being updated (such as the examples in the previous paragraphs). >It usually works well enough most of the time. I do it all the time >on my development machines. The problem is "well enough" and "most of >the time." >Warner I, for one, can attest to that. To the OP, the thing to watch out for is that just make sure that the machine isn't busy enough (stop all daemons under /usr/local/etc/rc.d/, under /etc/rc.d, just so that the machine's resources are being spent on the upgrade process), then do the make world dance. I've done it remotely a lot of times, the thing is you just have to simulate the process locally(if you have some spare resources, perhaps a VM?), to avoid potential problems. Here's a snippet from my one of my notes back in the 4.X days: ++++++++++++++++++++++ Upgrade path from 4.4Rp47 to 4.10R Issues to deal: 1) SSH Daemon Create the user/group # pw groupadd -n sshd -g 22 # pw useradd -n sshd -u 22 -g sshd -c "Secure Shell Daemon" -md /var/empty -s /sbin/nologin /var/empty must be: # ls -al /var/ dr-xr-xr-x 2 root wheel schg 512 Oct 27 2003 empty 2) Sendmail a) Create the smmsp user/group # pw groupadd -n smmsp -g 25 # pw useradd -n smmsp -u 25 -g smmsp -c "Sendmail Submission User" -md /var/spool/clientmqueue -s /sbin/nologin make sure that /var/spool/clientmqueue and everyting under is owned by smmsp:smmsp and rwx by this user/group root@beastman:/var/spool# dir /var/spool/clientmqueue/ rw------- 1 smmsp smmsp - 97 Jun 22 15:53 sm-client.pid If NOT: # chown -Rv smmsp:smmsp /var/spool/clientmqueue # chmod 770 /var/spool/clientmqueue b) Create the mailnull user/group # pw groupadd -n mailnull -g 26 # pw useradd -n mailnull -u 26 -g mailnull -c "Sendmail Default User" -md /var/spool/mqueue -s /sbin/nologin root@beastman:/var/spool# dir /var/spool/ drwxr-xr-x 2 root daemon - 512 Jun 23 03:02 mqueue drwxr-xr-x 2 root daemon - 512 Jun 22 03:01 mqueue.in drwx------ 2 root daemon - 512 Oct 27 2003 opielocks drwxr-xr-x 3 root daemon - 512 Apr 30 01:06 output Aliases file (/etc/mail/aliases): Add these: mailnull: postmaster smmsp: postmaster sshd: root +++++++++++++++++++++++++++ Once the above issues where addressed, the build/install world went fine. This was when I was in a situation that I needed to install a port and wouldn't install on a 4.4R ( name of port escapes me ;-) cheers mars PS My first email via my gmail account was blocked: +++++++++++++++++++++++++++++++ This is an automatically generated Delivery Status Notification Delivery to the following recipient failed permanently: freebsd-stable@freebsd.org Technical details of permanent failure: PERM_FAILURE: SMTP Error (state 10): 554 Service unavailable; Client host [64.233.162.201] blocked using bl.spamcop.net; Blocked - see http://www.spamcop.net/bl.shtml?64.233.162.201 __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
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