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Old 05-17-2012, 05:06 AM   #1
thiyagusham
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how to review boot messages ??


Hai to all ;


1. How to review boot messages ???
2. what are the thinks need to review while boot messages ???
3. Is there any major difference between RPM and Packages ????
" I think so RPM=PACKAGES "
Someone argue me like this
If package has .rpm extension " IT is called "RPM"
else
call it "PACKAGE"

I am planning to download Linux higher versions...
4. Today planning to download LINUX 5.7 and above versions
Is there any recommended URL ???

Thanks and Regards
Thiyagusham.G

Last edited by thiyagusham; 05-17-2012 at 05:07 AM.
 
Old 05-17-2012, 05:23 AM   #2
pan64
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I think you need to clarify some things all around linux:
1. http://www.linuxquestions.org/questi...ssages-795793/
2. I do not understand
3. RPM stands for redhat package manager, that is an abbreviation and also an extensions (a *.rpm file is usually a package).
4. what is linux 5.7?
linux cannot be downloaded or installed, you can download a distribution, there are many and all have different versions....
 
Old 05-17-2012, 05:48 AM   #3
salasi
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Linux is currently at version 3.4 (roughly); the version numbering for distribution of Linux is very different, and doesn't necessarily correlate to anything else, other than the other versions of the same distro. So, all this is meaningless unless we know which distro.

Quote:
2. what are the thinks need to review while boot messages ???
I can think of two interpretations:

2. what should you think of when reviewing boot messages ???

2. what are the things that are needed to review boot messages ???

Clarify, please. And, if you don't have anything installed, what are you concerned about in particular?

Quote:
3. Is there any major difference between RPM and Packages ????
Yes. Err, No. What do you mean?

Redhat Package Manager (well, that was the initial definition, RPM now just means RPM) is both a utility for managing packages and a type of package that may be managed. There are others, for example .deb (debian and derivatives, such as ubuntu, mint. mepis, etc). So a .rpm package is an example of a package, and the major difference with a .deb package is that they are made for a different system, but they do broadly the same thing. You could also have other packages in other formats, some of which are more 'do it yourself' than others, but the very broad idea of taking stuff and packaging it up into a single file doesn't change much.

The utilities used to make use of that file might be quite different, even for the same type of package.

Quote:
4. Today planning to download LINUX 5.7 and above versions
Is there any recommended URL ???
All of the ones where it is available, I suppose. This site has a 'download linux' link, and distrowatch is always a good reference.
 
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Old 05-17-2012, 05:54 AM   #4
thiyagusham
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@ pan64

Thank you . Ya .. It's my responsibility ...

Actually i am a ORACLE DBA Trainee. I successfully installed oracle 10g on OEL4.4

Trainer asked me

1. What command use to review boot messages and what do you check here ?
I can google with this question not much clear... I am not a linux admin ...

* * No issues about RPM.. All rpm's has .rpm extension * *

" you are saying a file is called a package .... "
i ran some rpm's while installing oracle.libaio.rpm => " This is rpm "
2. Does files have any extension ????
If so How can i identify ????

* * while issusing rpm -qa command i saw more listed * *

startup-notification-devel-0.7-1
gnome-panel-devel-2.8.1-3.3E
librsvg2-devel-2.8.1-1.el4.2
compat-gcc-32-3.2.3-47.3
ckermit-8.0.209-9

4. I think these are loaded RPM's by default while installing linux .
am i right ????
but some one says these are not rpms these are non run rpms like a file...

" Which one is right ???? " please don't suggest any websites .... I checked they didn't differentiate anything.. Simply they are giving definitions...
please clarify ....

Thanks & Regards
Thiyagusham.G

Last edited by thiyagusham; 05-17-2012 at 05:57 AM.
 
Old 05-17-2012, 06:07 AM   #5
pan64
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1. the boot messages are generated during the boot, that means the initial phase after you switched on that host. During this time the hardware is scanned, the parts are recognized, drivers loaded to be able to handle them. Those messages will contain all the related information. You can use the dmesg command to see it.

2. yes, filename (not the file itself) usually has two parts, the name and an extension (and a dot between them). The extension is used to describe the type of the file. In Windows this extension is really used to describe the type, in the linux world it is not necessary, but a good idea to use it. file.sh is usually a shell script, otherfile.sql is an sql script, a something.rpm is usually a package.
the packages can be installed on a system, and you have got a list of installed packages by rpm -qa. Not by default, but by someone. More or less these packages are usually installed, but not all required.
For example on debian linux the packages have another extension: package_name.deb.
 
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Old 05-17-2012, 06:16 AM   #6
thiyagusham
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@ pan , @ salasi

Thanks for your nice replies. Tomorrow i will discuss with my trainer . If i need any clarity i will post .. Thank you

Regards

Thiyagusham.G
 
Old 05-17-2012, 10:59 AM   #7
salasi
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Quote:
Originally Posted by thiyagusham View Post
1. What command use to review boot messages and what do you check here ?
I can google with this question not much clear... I am not a linux admin ...
While dmesg (see above) is clearly the answer that your trainer will be looking for
  • be aware that you don't need to use a command at all - all of the messages fly past, on the system console, at boot time; be aware that this is also inconveniently quick on modern hardware, so may not be the most useful suggestion that you have ever heard
  • dmesg implements a circular buffer, so when there get to be too many messages, the early ones get overwritten; now this shouldn't be a problem immediately after boot, but will start to be a problem some (ill-defined) time later

Tell me, would you think that entries in dmesg with, eg, error or warn in them should be given the same priority as other, purely informational, messages? Do you think that messages concerning critical services should be given the same priority as non-critical ones?

Oh, and not being a Linux admin doesn't get you off the hook; I know many end users who are perfectly able to deal with this.

Quote:
Originally Posted by thiyagusham View Post

" you are saying a file is called a package .... "
i ran some rpm's while installing oracle.libaio.rpm => " This is rpm "
Conventionally, all RPM package files have the extension .rpm, and all debian package files have the extension .deb (etc). To do anything else is to almost certainly cause confusion, but it isn't illegal. Not sure how the rpm utility behaves when presented with a file with an 'incorrect' extension, but you could always rename it to the correct extension.

Note also that while in MS Windows the extension has some deep meaning to the OS, here it doesn't. You could name a file text.a.b.c.d.e.f.g.h.i.j (or worse) or my.text.file.with.information.in.it, if you felt that served your purposes, but again, going to that extent is only likely to cause confusion, so don't do it (note that whatever.tar.gz files, for example, where it does serve a purpose, but it is left as an exercise for the interested student to work out what that purpose is.)


Quote:
am i right ????
but some one says these are not rpms these are non run rpms like a file...
  • everything is a file
  • I don't know what 'non run rpms like a file' would mean; non-runnable? have not been run? something else?

Essentially, everything installed on your system is in a database (calm down...not Oracle or MySQL) and initial installation puts them there. The installation utility must find a file that it knows how to handle (ie, has the correct format, so that the critical information is in the correct places) and it then carries out a series of actions to install. If the file to be installed has no unmet dependencies this is relatively simple; if it does have unmet dependencies, it is still relatively simple, but it has to recurse through the dependencies (ie, the same thing has to be done with the files on which the first file depends, except this time with, eg libraries and utilities on which the first depends).

Quote:
" Which one is right ???? " please don't suggest any websites .... I checked they didn't differentiate anything.. Simply they are giving definitions...
So, you have checked all of the ones that I might suggest. You have been working hard!
 
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Old 05-17-2012, 12:45 PM   #8
thiyagusham
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@ salasi

Vow ... What a fine Explanation step by step . Really nothing to say , SUPER! .... Tomorrow after my training session ,
yes , i will post. I am searching few things ..

Thanks and Regards
Thiyagusham.G
 
Old 05-17-2012, 07:07 PM   #9
chrism01
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You need to be clear also that strictly speaking 'Linux' is just the Kernel, currently about version 3.x, whereas each distro eg OEL, RHEL etc have a different numbering scheme (for the entire OS Release) eg latest RHEL is 6.2.
Code:
uname -a
will show kernel and other info
Code:
cat /etc/*release*
will show distro name /version.
Please ensure you provide those details when asking a qn.

Here's a good tutorial
http://rute.2038bug.com/index.html.gz

Loads of free to read manuals/books etc
www.linuxtopia.org


Boot msgs: look in
/var/log/boot.log
/var/log/dmesg

General dump file for services that don't have a dedicated specific log file is /var/log/messages

Last edited by chrism01; 05-17-2012 at 07:09 PM.
 
Old 05-18-2012, 10:18 AM   #10
thiyagusham
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@ pan , @ salasi , @ chrism01

Good Evening to all ;

" No more questions from ur answers " I am very clear about that

** Till this msg i am using this linux . Now i have ISO [OEL-5] version going to install **

Quote:
[root@dhcppc1 ~]# cat /etc/*release*
Enterprise Linux Enterprise Linux AS release 4 (October Update 4)
cat: /etc/lsb-release.d: Is a directory
Enterprise Linux Enterprise Linux AS release 4 (October Update 4)
" now i am installing OEL 5 .I am having few doubts what are packages to select while installing.
Incase i miss anything , how can i install manually - i mean via terminal.
"
1.Some times i am plannig to upload screen shots .I don't know where is the lnk to upload here ????
2. Yesterday i tried to install Google chrome on OEL 4.4.
I got error msg like this

Quote:
but warning: only V3 signatures can be verified, skipping V4 signature
error: Failed dependencies:
lsb >= 4.0 is needed by google-chrome-stable-19.0.1084.46-135956.i386
libc.so.6(GLIBC_2.11) is needed by google-chrome-stable-19.0.1084.46-135956.i386
libcurl.so.4 is needed by google-chrome-stable-19.0.1084.46-135956.i386
libnss3.so(NSS_3.12.3) is needed by google-chrome-stable-19.0.1084.46-135956.i386
xdg-utils is needed by google-chrome-stable-19.0.1084.46-135956.i386
3. Always i am using Host/Guest o/s (Windows ultimat 7). Whenever i work on linux I am making VIDEO.
Picture is not clear. How can i capture clear video's. In my system i installed Vmware Workstation 6.5 - 7.0


Thanks in advance;
Thiyagusham.G
 
Old 05-18-2012, 12:10 PM   #11
pan64
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if you have another questions please open a new thread, nobody will find your question about videos in this thread.







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