[CentOS] is yum a complete substitute of rpm?
On Mon, 15 Feb 2010, Bowie Bailey wrote: > I use rpm for basic stuff because it runs faster. For example: > > $ time yum list installed > ... > real0m17.069s > user0m0.857s > sys 0m0.675s > > $ time rpm -qa > ... > real0m4.714s > user0m4.457s > sys 0m0.120s > > Yum tends to take a while to read in its databases before it processes > your command. So for simple commands, it is faster to use rpm. On slow > boxes, it can be significantly faster. naw -- The 'speed' issue here comes down to a scripting language v a compiled one -- librpm underneath on each in CentOS 5. Here is a more apple to apples comparison on those timings on the work being done [herr...@centos-5 clang]$ time rpm -qa --nosignature \ --nodigest > /dev/null real0m0.329s user0m0.208s sys 0m0.076s [herr...@centos-5 clang]$ time yum list installed > /dev/null real0m4.252s user0m1.948s sys 0m0.132s [herr...@centos-5 clang]$ -- Russ herrold ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On Monday 15 February 2010, Bowie Bailey wrote: > Jim Green wrote: > > On 13 February 2010 10:27, Robert P. J. Day wrote: > >> On Sat, 13 Feb 2010, Jim Green wrote: > >> > >> > >> $ rpm -qa # list all installed packages > > > > yum list installed > > I use rpm for basic stuff because it runs faster. For example: > > $ time yum list installed > ... > real0m17.069s > user0m0.857s > sys 0m0.675s > > $ time rpm -qa > ... > real0m4.714s > user0m4.457s > sys 0m0.120s A nice twist is that "-qa" can be extened to "-qa --last" to get the output sorted on install date (or you can have any format you want with --qf like a previous poster suggested). /Peter signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
Jim Green wrote: > On 13 February 2010 10:27, Robert P. J. Day wrote: > >> On Sat, 13 Feb 2010, Jim Green wrote: >> >> >> $ rpm -qa # list all installed packages >> > > yum list installed I use rpm for basic stuff because it runs faster. For example: $ time yum list installed ... real0m17.069s user0m0.857s sys 0m0.675s $ time rpm -qa ... real0m4.714s user0m4.457s sys 0m0.120s Yum tends to take a while to read in its databases before it processes your command. So for simple commands, it is faster to use rpm. On slow boxes, it can be significantly faster. -- Bowie ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
> Thank Robert and Ron, Could you list an example where I need to use
> rpm command alone? I used rpm to install stand alone package if that
> is the case.
This one illustrates the kind of information you rather get with the
rpm command (here the installed size):
# List RPMS ordered by size (biggest last)
rpm -q -a --qf '%10{SIZE}\t%{NAME}\n' | sort -k1,1n
Useful when you need to make room in an /usr partition for example
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Re: [CentOS] is yum a complete substitute of rpm?
On Saturday 13 February 2010, Robert P. J. Day wrote: > On Sat, 13 Feb 2010, Jim Green wrote: ... > > Thank Robert and Ron, Could you list an example where I need to use > > rpm command alone? I used rpm to install stand alone package if that > > is the case. > > i suspect there are yum alternatives for some of these but here's > some stuff i like: > > $ rpm -qa # list all installed packages > $ rpm -qR # list dependencies of package > $ rpm -ql # display list of files in package > $ rpm -qf # what package is from? > > and many others. One from me: $ rpm -V # verify all files from installed pkg /Peter signature.asc Description: This is a digitally signed message part. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
At Sat, 13 Feb 2010 10:00:14 -0600 CentOS mailing list wrote: > > Dear Centos community, > I am new to centos/redhat and I would like to know on a centos system, > can I use yum alone to do all package management? I don't want to learn > two systems and confuse myself, I understand yum is much better than > rpm if is the case? yum is layered on top of RPM. That is, yum uses rpm itself to actually manage packages. yum adds several additional features/functions: 1) It deals with dependencies (rpm only complains about dependencies, but makes no attempt on its own to resolve dependencies). 2) It deals with updates from one (or more) repositories. A repository is a collection of RPMs, from which updates and/or dependencies can be resolved as well as a source of packages to install. > > Thank you! > > Jim > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > > -- Robert Heller -- 978-544-6933 Deepwoods Software-- Download the Model Railroad System http://www.deepsoft.com/ -- Binaries for Linux and MS-Windows hel...@deepsoft.com -- http://www.deepsoft.com/ModelRailroadSystem/ ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On 13 February 2010 10:35, Kwan Lowe wrote: >> Thank Robert and Ron, Could you list an example where I need to use >> rpm command alone? I used rpm to install stand alone package if that >> is the case. > > If you need information on a specific package then you'll likely need > to use rpm directly. For the most part, anytime I need to install a > package I use yum. This includes installing a standalone package. I > use rpm mainly during troubleshooting. For example, to list package > contents, scripts, or extract portions of a package. Thank Kwan, I get a much better feel of when to use rpm/yum now. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On 13 February 2010 10:27, Robert P. J. Day wrote: > On Sat, 13 Feb 2010, Jim Green wrote: > >> On 13 February 2010 10:13, Ron Loftin wrote: >> > >> > On Sat, 2010-02-13 at 10:00 -0600, Jim Green wrote: >> >> Dear Centos community, >> >> I am new to centos/redhat and I would like to know on a centos system, >> >> can I use yum alone to do all package management? I don't want to learn >> >> two systems and confuse myself, I understand yum is much better than >> >> rpm if is the case? >> > >> > I expect that you will get a bunch of replies on this. >> > >> > The short form is that yum lives on TOP of RPM. It is not a replacement >> > for RPM. >> > >> > Yum does most of the thinking for you as far as dependency >> > management. It is much more user-friendly, and is the preferred >> > mechanism for software installation and maintenance because it >> > does the dependency resolution for you, and saves much in the way >> > of headaches, elevated stress, confusion, and RSI from excessive >> > keyboard use. >> > >> > All that being said, there are times when you do want to use RPM >> > by itself, without Yum. If you stay with CentOS and/or RedHat >> > long enough, you will run across this situation now and then. >> >> Thank Robert and Ron, Could you list an example where I need to use >> rpm command alone? I used rpm to install stand alone package if that >> is the case. > > i suspect there are yum alternatives for some of these but here's > some stuff i like: > > $ rpm -qa # list all installed packages yum list installed > $ rpm -qR # list dependencies of package yum deplist > $ rpm -ql # display list of files in package > $ rpm -qf # what package is from? yum provides this kind of exercise is fun. I came from debian and it is fun to make matches:) ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
> Thank Robert and Ron, Could you list an example where I need to use > rpm command alone? I used rpm to install stand alone package if that > is the case. If you need information on a specific package then you'll likely need to use rpm directly. For the most part, anytime I need to install a package I use yum. This includes installing a standalone package. I use rpm mainly during troubleshooting. For example, to list package contents, scripts, or extract portions of a package. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On Sat, 13 Feb 2010, Jim Green wrote: > On 13 February 2010 10:13, Ron Loftin wrote: > > > > On Sat, 2010-02-13 at 10:00 -0600, Jim Green wrote: > >> Dear Centos community, > >> I am new to centos/redhat and I would like to know on a centos system, > >> can I use yum alone to do all package management? I don't want to learn > >> two systems and confuse myself, I understand yum is much better than > >> rpm if is the case? > > > > I expect that you will get a bunch of replies on this. > > > > The short form is that yum lives on TOP of RPM. It is not a replacement > > for RPM. > > > > Yum does most of the thinking for you as far as dependency > > management. It is much more user-friendly, and is the preferred > > mechanism for software installation and maintenance because it > > does the dependency resolution for you, and saves much in the way > > of headaches, elevated stress, confusion, and RSI from excessive > > keyboard use. > > > > All that being said, there are times when you do want to use RPM > > by itself, without Yum. If you stay with CentOS and/or RedHat > > long enough, you will run across this situation now and then. > > Thank Robert and Ron, Could you list an example where I need to use > rpm command alone? I used rpm to install stand alone package if that > is the case. i suspect there are yum alternatives for some of these but here's some stuff i like: $ rpm -qa # list all installed packages $ rpm -qR# list dependencies of package $ rpm -ql# display list of files in package $ rpm -qf # what package is from? and many others. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On 13 February 2010 10:13, Ron Loftin wrote: > > On Sat, 2010-02-13 at 10:00 -0600, Jim Green wrote: >> Dear Centos community, >> I am new to centos/redhat and I would like to know on a centos system, >> can I use yum alone to do all package management? I don't want to learn >> two systems and confuse myself, I understand yum is much better than >> rpm if is the case? > > I expect that you will get a bunch of replies on this. > > The short form is that yum lives on TOP of RPM. It is not a replacement > for RPM. > > Yum does most of the thinking for you as far as dependency management. > It is much more user-friendly, and is the preferred mechanism for > software installation and maintenance because it does the dependency > resolution for you, and saves much in the way of headaches, elevated > stress, confusion, and RSI from excessive keyboard use. > > All that being said, there are times when you do want to use RPM by > itself, without Yum. If you stay with CentOS and/or RedHat long enough, > you will run across this situation now and then. Thank Robert and Ron, Could you list an example where I need to use rpm command alone? I used rpm to install stand alone package if that is the case. Jim ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On Sat, 2010-02-13 at 10:00 -0600, Jim Green wrote: > Dear Centos community, > I am new to centos/redhat and I would like to know on a centos system, > can I use yum alone to do all package management? I don't want to learn > two systems and confuse myself, I understand yum is much better than > rpm if is the case? I expect that you will get a bunch of replies on this. The short form is that yum lives on TOP of RPM. It is not a replacement for RPM. Yum does most of the thinking for you as far as dependency management. It is much more user-friendly, and is the preferred mechanism for software installation and maintenance because it does the dependency resolution for you, and saves much in the way of headaches, elevated stress, confusion, and RSI from excessive keyboard use. All that being said, there are times when you do want to use RPM by itself, without Yum. If you stay with CentOS and/or RedHat long enough, you will run across this situation now and then. > > Thank you! > > Jim > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos -- Ron Loftin relof...@twcny.rr.com "God, root, what is difference ?" Piter from UserFriendly ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] is yum a complete substitute of rpm?
On Sat, 13 Feb 2010, Jim Green wrote: > Dear Centos community, I am new to centos/redhat and I would like to > know on a centos system, can I use yum alone to do all package > management? I don't want to learn two systems and confuse myself, I > understand yum is much better than rpm if is the case? yum is simply a layer built on top of rpm. it's nice if you can do everything you want with yum, but it doesn't hurt to learn the basics of rpm anyway. rday -- Robert P. J. Day Waterloo, Ontario, CANADA Linux Consulting, Training and Kernel Pedantry. Web page: http://crashcourse.ca Twitter: http://twitter.com/rpjday ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] is yum a complete substitute of rpm?
Dear Centos community, I am new to centos/redhat and I would like to know on a centos system, can I use yum alone to do all package management? I don't want to learn two systems and confuse myself, I understand yum is much better than rpm if is the case? Thank you! Jim ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
