Re: [CentOS] setting up bare minimal CentOS VM
Hello Rudi, On Wed, 2011-08-10 at 00:17 +0200, Rudi Ahlers wrote: Well, I setup CentOS 6 using the netinstall ISO, but want to know if there are still packages which I don't need and can remove Do a minimal install then # rpm -qa | sort or # cat /var/log/rpmpkgs then # rpm -e unwanted package rpm -e will not remove any package that has dependencies on it. But you better add the extra packages you need (f.e. things like mc and system-config*) before you start pruning, as they might pull back in a lot of the stuff you might think about taking out (most notably perl). Regards, Leonard. -- mount -t life -o ro /dev/dna /genetic/research ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 08:32:40AM +0200, Leonard den Ottolander wrote: rpm -e will not remove any package that has dependencies on it. Along similar lines there is this short shell script put together by Mike Harris. This will go through all installed rpms and list which may be removable based on outstanding dependencies. In order to make full use of this script you should run it after every package removal as dependencies will change. Using this, or similar concepts, it's possible to get an extremely small base system installed by using the remaining package set in a kickstart install. #!/bin/sh # ## this script originated from a one-liner posted to #centos-social ## by Mike Harris; mharris on irc.freenode.net. Script used with ## permission. # for each in $(rpm -qa |sort) do echo $(rpm -e --test $each /dev/null echo YES || echo 'NO '): $each done -- Here's what I do know. I don't care. I'm sick of it. I'm sick of needy, crazy, stupid liars. Seriously, I can't take it anymore. I grew up with them, I live with them, I work with them. And no matter how fast I run or how far I go they breed and come after me. It's like a zombie movie except the only scary part is it never ends. -- 13 seconds of dialogue from Mary McCormack as Mary Shannon in USA's In Plain Sight pgpLIwlomg2Uv.pgp Description: PGP signature ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Tue, 9 Aug 2011, Craig White wrote: On Aug 9, 2011, at 3:40 PM, John R Pierce wrote: On 08/09/11 3:10 PM, Rudi Ahlers wrote: Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? rpm -qa (after doing that minimal install) really isn't neccessary is highly subjective, noone else can make that call for you. sheesh... after doing that minimal install, you have a complete kickstart script written for you already... /root/anaconda-ks.cfg I can't believe that no one actually picked up on that In C6 this is very broken!! It is not useful. Sometimes it shows the packages that were installed and most of the time it does not. In addition, it does not even get the disk layout right. If I take what is in anaconda-ks.cfg and paste it into a kickstart file. It blows chunks. Sometimes I can figure out what is wrong but other times I cannot get it to work. I fought with a software raid 1 setup yesterday and never did get it to work. At some point I need to file a bug wrt this but I have not taken the time to do it yet. Regards, -- Tom Diehl tdi...@rogueind.com Spamtrap address mtd...@rogueind.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Tue, 9 Aug 2011, John R Pierce wrote: On 08/09/11 4:02 PM, Craig White wrote: you have a complete kickstart script written for you already... /root/anaconda-ks.cfg speaking of kickstart... I may need to setup a portable kickstart server for CentOS 6 , and I've never really messed with it... how do you supply the ks.cfg file when you're PXE booting and have no CD or floppy? is there a good how-to on setting up kickstart servers for EL6 ? redhat can't be serious when they say... http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-netboot-pxe-config.html 30.2. PXE Boot Configuration The next step is to copy the files necessary to start the installation to the tftp server so they can be found when the client requests them. The tftp server is usually the same server as the network server exporting the installation tree. (end of section) like, *WHAT* files?? does anyone PROOF READ this stuff ?!? (yeah, I know, this is upstream's problem, not CentOS...) You might want to look at https://fedorahosted.org/cobbler/ Regards, -- Tom Diehl tdi...@rogueind.com Spamtrap address mtd...@rogueind.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
+1 I use Cobbler/KOAN all the time... And setting up a bare bones VM - super trivial... On Wed, 10 Aug 2011, Tom Diehl wrote: On Tue, 9 Aug 2011, John R Pierce wrote: On 08/09/11 4:02 PM, Craig White wrote: you have a complete kickstart script written for you already... /root/anaconda-ks.cfg speaking of kickstart... I may need to setup a portable kickstart server for CentOS 6 , and I've never really messed with it... how do you supply the ks.cfg file when you're PXE booting and have no CD or floppy? is there a good how-to on setting up kickstart servers for EL6 ? redhat can't be serious when they say... http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-netboot-pxe-config.html 30.2. PXE Boot Configuration The next step is to copy the files necessary to start the installation to the tftp server so they can be found when the client requests them. The tftp server is usually the same server as the network server exporting the installation tree. (end of section) like, *WHAT* files?? does anyone PROOF READ this stuff ?!? (yeah, I know, this is upstream's problem, not CentOS...) You might want to look at https://fedorahosted.org/cobbler/ Regards, -- Tom Diehl tdi...@rogueind.com Spamtrap address mtd...@rogueind.com ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos Scot P. Floess RHCT (Certificate Number 605010084735240) Chief Architect FlossWare http://sourceforge.net/projects/flossware http://flossware.sourceforge.net https://github.com/organizations/FlossWare ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
From: Rudi Ahlers r...@softdux.com Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? Maybe try something like: grep 'id\|mandatory\|default' /PATH/TO/REPO/6/os/x86_64/repodata/*comps.xml | sed 's/[a-z/]*//g; s/packagereq type=//g' | tr '' ' ' JD ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] setting up bare minimal CentOS VM
Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
on 8/9/2011 3:10 PM Rudi Ahlers spake the following: Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? I think they are creating a minimal install CD image, if they haven't already released it. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 12:16 AM, Scott Silva ssi...@sgvwater.com wrote: on 8/9/2011 3:10 PM Rudi Ahlers spake the following: Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? I think they are creating a minimal install CD image, if they haven't already released it. ___ Well, I setup CentOS 6 using the netinstall ISO, but want to know if there are still packages which I don't need and can remove -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Aug 9, 2011, at 3:10 PM, Rudi Ahlers wrote: Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? do you mean as in /root/anaconda-ks.cfg ? Craig ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 12:23 AM, Craig White craig.wh...@ttiltd.com wrote: On Aug 9, 2011, at 3:10 PM, Rudi Ahlers wrote: Hi all, I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? do you mean as in /root/anaconda-ks.cfg ? Craig ___ Craig, yes, and no. I am actually looking for a list of software packages that can be removed without breaking the running OS. like for example bluez-libs or cronie-anacron which isn't necessarily needed for a bare-minimum system to run. I honestly don't just want to delete stuff that I don't know if it could break something, so I was hoping maybe someone knows of a list (on a wiki / blog / etc) that has a really bare minimum list of software that needs to be on a server to function. I could install anything else later on if I need to though. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On 08/09/11 3:10 PM, Rudi Ahlers wrote: Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? rpm -qa (after doing that minimal install) really isn't neccessary is highly subjective, noone else can make that call for you. -- john r pierceN 37, W 122 santa cruz ca mid-left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
snip Craig, yes, and no. I am actually looking for a list of software packages that can be removed without breaking the running OS. like for example bluez-libs or cronie-anacron which isn't necessarily needed for a bare-minimum system to run. I honestly don't just want to delete stuff that I don't know if it could break something, so I was hoping maybe someone knows of a list (on a wiki / blog / etc) that has a really bare minimum list of software that needs to be on a server to function. I could install anything else later on if I need to though. I really think the minimal CD would be about as lean as you would want to go. You could maybe trim a few megs, but is it worth the extra work? ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Wed, Aug 10, 2011 at 12:41 AM, Scott Silva ssi...@sgvwater.com wrote: snip Craig, yes, and no. I am actually looking for a list of software packages that can be removed without breaking the running OS. like for example bluez-libs or cronie-anacron which isn't necessarily needed for a bare-minimum system to run. I honestly don't just want to delete stuff that I don't know if it could break something, so I was hoping maybe someone knows of a list (on a wiki / blog / etc) that has a really bare minimum list of software that needs to be on a server to function. I could install anything else later on if I need to though. I really think the minimal CD would be about as lean as you would want to go. You could maybe trim a few megs, but is it worth the extra work? ___ Hi Scott, I didn't know about the minimal CD until now. And it's not really about trimming a few extra megs, but rather about removing, and disabling services which users generally won't use but gets installed and often cause security issues down the road cause it was never disabled -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Aug 9, 2011, at 3:40 PM, John R Pierce wrote: On 08/09/11 3:10 PM, Rudi Ahlers wrote: Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? rpm -qa (after doing that minimal install) really isn't neccessary is highly subjective, noone else can make that call for you. sheesh... after doing that minimal install, you have a complete kickstart script written for you already... /root/anaconda-ks.cfg I can't believe that no one actually picked up on that Craig ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On 08/09/11 4:02 PM, Craig White wrote: you have a complete kickstart script written for you already... /root/anaconda-ks.cfg speaking of kickstart... I may need to setup a portable kickstart server for CentOS 6 , and I've never really messed with it... how do you supply the ks.cfg file when you're PXE booting and have no CD or floppy? is there a good how-to on setting up kickstart servers for EL6 ? redhat can't be serious when they say... http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-netboot-pxe-config.html 30.2. PXE Boot Configuration The next step is to copy the files necessary to start the installation to the tftp server so they can be found when the client requests them. The tftp server is usually the same server as the network server exporting the installation tree. (end of section) like, *WHAT* files?? does anyone PROOF READ this stuff ?!? (yeah, I know, this is upstream's problem, not CentOS...) -- john r pierceN 37, W 122 santa cruz ca mid-left coast ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Tue, Aug 9, 2011 at 6:10 PM, Rudi Ahlers r...@softdux.com wrote: I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? Kickstart minimal: either %packages --nobase @Core or %packages @Base I'm not sure what's installed when you don't select anything in Anaconda but if you have such an install you can compare the output of rpm -qa with yum groupinfo Core and yum groupinfo Base. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] setting up bare minimal CentOS VM
On Tue, Aug 9, 2011 at 7:33 PM, Tom H tomh0...@gmail.com wrote: On Tue, Aug 9, 2011 at 6:10 PM, Rudi Ahlers r...@softdux.com wrote: I need to setup a real bare minimum CentOS Virtual Machine, but with normal internet / network access. i.e. I need SSH, Mutt, Links, lynx, ping, tracert, dig, iptables, etc. Does anyone know where (if?) I can get a list of applications which gets installed with CentOS 6 if every option is deselected in the installer so that I can see what I can remove which isn't really necessary once installed? Kickstart minimal: either %packages --nobase @Core or %packages @Base I'm not sure what's installed when you don't select anything in Anaconda but if you have such an install you can compare the output of rpm -qa with yum groupinfo Core and yum groupinfo Base. Oops. I've just checked yum groupinfo ... and it doesn't list all packages installed by Core and Base (about 200 and 400 packages respectively). I presume that dependencies aren't included in groups... ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] setting up bare minimal CentOS VM
On Tue, 9 Aug 2011, John R Pierce wrote: how do you supply the ks.cfg file when you're PXE booting and have no CD or floppy? ummm ... with DHCP, handing out the correct boot vmlinuz image under PXE for the MAC address in question, and kernel command line arguments, one of which is the location of the ks.cfg, and of the initrd, usually through a 'next' server [being a 'next' server, because it provides the next needed information] again through the TFTPD, DHCPD and (usually) FTPD or HTTPD It has not changed for years, and in all honesty, as much of what is happening is burned into 'state machines, inside of boot roms on network interfaces, it will NEVER change substantially. See, HPA's work with SYSLINUX It is fully tested by me under CentOS 6, as part of my install testing -- so-called wire installs are how I always install is there a good how-to on setting up kickstart servers for EL6 ? We installed perhaps ten units that way today under C6 I've pretty well covered everything that can go wrong in such a process, starting a decade ago http://www.owlriver.com/tips/pxe-install/ http://www.owlriver.com/tips/hands-off/ http://www.owlriver.com/tips/tftp-xinetd/ http://www.owlriver.com/tips/centos-upgradeany/ http://www.owlriver.com/tips/tiny-centos/ http://www.owlriver.com/tips/minimal-installer/ http://www.shabazian.com/lw2007.pdf (Chip Shabazian) and of course the LTSP (Jim McQuillan) and K12LTSP (gone dark, and owned by a domain squatter, now-a-days) projects' work in Linux space redhat can't be serious when they say... http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Installation_Guide/s1-netboot-pxe-config.html like, *WHAT* files?? does anyone PROOF READ this stuff ?!? (yeah, I know, this is upstream's problem, not CentOS...) There are no typos that I see there All the pointers you need to get started are in that paragraph. All URL's above are 'primary sources' and orininal content on how to do it -- Russ herrold ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
