Linux Compared To UNIX

I've been a Linux administrator for almost 10 years and sadly I've never touched a UNIX shell beyond variant flavors of Linux. I find it hard enough to keep myself fresh on the differences between RHEL, Debian, or Arch Linux. I've been wanting to load a UNIX O.S. on VirtualBox but honestly I'm debating if there is any significance between running Linux on a server or running UNIX. Obviously a lot of older guys who have been on the I.T. gig for years started on some kind of UNIX (probably Solaris) but for them it worked at that time and I don't think Linux was what it is today in regards to security & performance. Can you guys tell me if there are any significant advantages of running UNIX over Linux or vice versa?
Thanks for any info.

Gullible Jones wrote:BSD package management is very good. Notably nothing to search packages is installed by default on any major BSD flavor, but search utilities (and orphan removers, curses interfaces, etc.) are available in the repositories - for NetBSD you want pkgin, for OpenBSD IIRC it's pkg_mgr.
OpenBSD does have searching available by default, but it’s awkward: “cd /usr/ports && make search name=netsurf”. The devs suggest sqlports instead.
Gullible Jones wrote:For drive mounting, FreeBSD has DevFS rules that might or might not work. Net and Open, AFAIK, do not support automatic mounting…
OpenBSD has hotplugd(8). With that I was able to replace my sister’s Ubuntu with OpenBSD running GNOME. The only things she misses are Flash (which I got around with a Firefox extension) and a GUI for wireless configuration (unfortunately, pretty much a lost cause). As a plus, her laptop actually suspends and resumes properly now.
I’ve been using OpenBSD as a desktop for three years now. I think it’s nice. Very lightweight, a focus on correctness and security, and some interesting features. In particular, the man pages are excellent. Being on a non‐Linux platform has also taught me a lot about writing more portable code.
Carlwill wrote:Are there any free variants of UNIX? I know OpenSolaris is dead but I really hard so many amazing things about ZFS file system.
I hear FreeBSD is a popular platform for running ZFS, but I’ve never tried it myself.
Last edited by Anthony Bentley (2011-03-27 05:49:33)

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Linux vs. Unix

Hello...
I'm wondering whether any specific performance issues are more enhanced on Linux than on Unix? regardless of the difference on cost.
Best regards
Aly ELMarsafy

Sunil,
Trends keep on changing and so will be the answers of questions like these. About 7 years back, when I was starting, Solaris was known as the best o/s for Oracle. Even in OU, the training was done over solaris and someone told me that Oracle was using Solaris only internally. But, than something happened and Oracle corp shifted to Linux and so did the world.
I shall go with Enrique with this one that Aix is the known to be the 2nd most stable combo with oralce db after solaris.
Just for fun, you may give Vista a chance too ;-). Who knows , you will get the "wow" effect :-) .
Just a "me 2" reply.
Aman....

Migrate DB from linux box to unix box

any specific metalink document available for doing the migration of DB from linux to unix..
thanks
regards

You can use the Transport tablespace concept. But it is important for you to be on a 10g database, otherwise the only way you can perform this migration is by using the traditional export/import.
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14231/tspaces.htm#sthref1287

ORA-12547: TNS:lost contact Linux with different unix userids

Hi all,
I have installed Oracle under the linux username oracle. I can connect to the database as system user sqlplus. When I log on to a different username, I get the TNS: lost contact error.
I made sure that the new username is in the dba group and the entire /home/oracle directory structure allows access to the dba group.
What else do I need to do to allow other linux usernames besides oracle to connect to the database?
Thanks,

[satin@ddschwitrh4 ~]$ diff /tmp/satin.env /tmp/oracle.env
_=/bin/env
COLORTERM=gnome-terminal
DBUS_SESSION_BUS_ADDRESS=unix:abstract=/tmp/dbus-P4ptdaASXQ
DESKTOP_SESSION=default
DESKTOP_STARTUP_ID=
GDMSESSION=default
GNOME_DESKTOP_SESSION_ID=Default
GNOME_KEYRING_SOCKET=/tmp/keyring-tPzxmx/socket
GTK_RC_FILES=/etc/gtk/gtkrc:/home/satin/.gtkrc-1.2-gnome2
HOME=/root
HOME=/home/oracle
LD_LIBRARY_PATH=/home/oracle/app/oracle/product/11.2.0/dbhome_1/lib
LOGNAME=satin
LOGNAME=oracle
MAIL=/var/spool/mail/satin
NWISDB=ORACLE
OLDPWD=/home/satin/oracledecodes
MAIL=/var/spool/mail/oracle
NWISDB=NWISDD
OLDPWD=/home/oracle/oracledecodes35,36c29,31
< PATH=/usr/java/latest/bin:/usr/kerberos/sbin:/usr/java/latest/bin:/usr/ant/bin:/usr/opt/DECODES/bin:/usr/java/latest/bin:/usr/ant/bin:/usr/opt/DECODES/bin:/usr/kerberos/bin:/usr/local/bin:/usr/bin:/bin:/usr/X11R6/bin:/home/satin/bin:/home/oracle/app/oracle/product/11.2.0/dbhome_1/bin
< PWD=/root
ORACLE_TERM=xterm
PATH=/usr/java/latest/bin:/usr/ant/bin:/usr/opt/DECODES/bin:/usr/kerberos/bin:/usr/local/bin:/bin:/usr/bin:/usr/X11R6/bin:/home/oracle/bin:/home/oracle/app/oracle/product/11.2.0/dbhome_1/bin
PWD=/home/oracle38d32
< SESSION_MANAGER=local/ddschwitrh4.er.usgs.gov:/tmp/.ICE-unix/5636
40,41c34
< SHLVL=3
< SSH_AGENT_PID=5666
SHLVL=143d35
< SSH_AUTH_SOCK=/tmp/ssh-hIEyPP5636/agent.5636
45,48c37,38
< USER=satin
< _=/usr/bin/env
< WINDOWID=18874447
< XAUTHORITY=/root/.xauthdeWnqQ
USER=oracle
XAUTHORITY=/home/oracle/.xauthiGYDCi[satin@ddschwitrh4 ~]$ uname -a
Linux ddschwitrh4.er.xxxx.gov 2.6.9-89.0.26.ELsmp #1 SMP Sun May 30 09:31:52 EDT 2010 i686 i686 i386 GNU/Linux
[satin@ddschwitrh4 ~]$ cat /etc/hosts
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
130.xx.xxx.41 ddschwitrh4.er.xxxx.gov dschwitrh4.er.xxxx.gov ddschwitrh4
[oracle@ddschwitrh4 ~]$ id
uid=510(oracle) gid=512(oracle) groups=502(nwuser),510(nwdba),512(oracle)
[satin@ddschwitrh4 ~]$ id
uid=502(satin) gid=503(satin) groups=502(nwuser),503(satin),512(oracle),513(dba)
Regards.

Net is slow on my arch linux compared to that in xp`

hi
My download speed went down recently so i called my isp hes told me to change link speed to 10mbps HD i did it and after that download speed became normal in xp but in arch linux i used mii tool to change the link speed but the speed is still less , my isp guy said he doesnt know much about linux..Can someone suggest me something ...thanks in advance

Check your DNS servers in /etc/resolv.conf
If you have more than one server listed, and one of them isn't responding then that could be causing delays for you, although that wouldn't affect the actual download speed, just the time it takes to resolve (which would directly impact your perceived browsing speed)
#!/bin/bash
for SERVER in $(grep '^nameserver' /etc/resolv.conf | awk '{ print $2 }') ; do
dig google.com.au @$SERVER
if [ $? -ne 0 ] ; then
echo "ERROR WITH SERVER $SERVER"
fi
done
EDIT: You'll need to install the 'dnsutils' package before running the above script
Last edited by fukawi2 (2009-08-16 22:48:15)

Linux based on unix?

is there any connection between them?

Very well put, Dusty.
Redge, our take is that before asking a question you should at least do preliminary research. On the Internet especially, since it's so easy to Google and check Wikipedia. This is partly a courtesy to the people you're asking (although it's not Did22's fault if he isn't familiar with the custom), but it's also because a search and consultation of relevant references will likely get an answer much closer to what you're wondering about than whatever short responses to your vague uninformed question forumites have time to type out.
Taking this question for example, is there any way to guess what he's asking about? It could be anything from system structure (in which case the answer is yes) to the fairly recent SCO trouble (in which case it is no). Is it more helpful for us to throw out some shot-in-the-dark answers to a question that could be better answered by easy-to-find references, or is it more helpful just to direct him to those?
EDIT: You posted while I was composing, so I'll just add on here:
Perhaps you should take another look at those encyclopedias. I don't use the paper kind much since it would be awkward to carry twenty tomes of knowledge with me, but Wikipedia is by far the best resource ever created by people when it comes to getting a handle on a topic you know nothing about.
As you say, that isn't the point. I fail to see how anyone (except us by you, maybe ) has been mistreated here, except for the chuckle, which is rather mild. The first two posts were pointers to massive stores of information that will tell the intrepid reader more than they ever wanted to know about Linux. The third gives about the best reply you could expect to a post so vague. From there we're just talking about manners.
You may not have much time for Google and Wikipedia, but the rest of us don't have an infinite amount of time to spend guessing what a person may mean, gathering the relevant information in our minds, and typing it out. It is quite an imposition on your part to assume that 20 minutes of your time spent reading about a topic in which you are interested is more valuable than 20 or more minutes of my time spent writing about a topic on which I may happen to have knowledge. I, and most of us here, are glad to help as much as we possibly can with tricky questions that aren't easy to research. I'm not going to leave someone hanging if I don't have to. But I'm also not anyone's personal reference librarian. Sometimes it's completely appropriate to point someone to the encyclopedia.

Security Concerning BASH in OS X, Linux, BSD, and Unix

http://arstechnica.com/security/2014/09/bug-in-bash-shell-creates-big-security-h ole-on-anything-with-nix-in-it/?utm_content=buffere14e0&utm_medium=social&utm_so urce=facebook.com&utm_campaign=buffer
The command line code:
env x='() { :;}; echo vulnerable' bash -c "echo this is a test"
Is a confirmed vulnerability and needs to be addressed. This is the output:
vulnerable
this is a test
A secure output should be:
bash: warning: x: ignoring function definition attempt
bash: error importing function definition for `x'
this is a test

There are plenty of bad things that could happen to a system due to existing vulnerabilities, known or unknown. There is no reason for any more concern today than there has ever been. Bash has been included with OS X for years, perhaps since its inception.
Other vulnerabilities may also be discovered and exploited, now or in the future. The resulting effects, if there are any, cannot be accurately predicted.
Until then:
Ignore hyperventilating popular media outlets that thrive by promoting fear and discord with entertainment products arrogantly presented as "news". Learn what real threats actually exist and how to arm yourself against them.
Do install updates from Apple as they become available. No one knows more about Macs and how to protect them than the company that builds them.

How to access Oracle Apps from Linux or Unix Client

I want to access Oracle Apps 11i from a linux client or Unix client, but I don't have jinit for linux or Unix
regards,
Jonathan

Hi,
That is not a problem just you can get in to linux inet browser and put the hostname.domainname.com:portnumber/OA_HTML/US/ICSINDEX.HTM
So that you can get the apps sign on screen will be launched up and available to access in to Oracle applications.
The work could be done in solaris browser and linux browser is possible.
Thanks and Regards
Riyaas
Oracle Applications DBA
[email protected]
Kuwait

Unix Vs. Linux

Hello Everyone
Can you please provide me with a data on Linux vs. Unix. Mostly from the perspective on how either works with DB2 and how either works with Oracle.
I need to make a decision
Thank you

http://www.google.com/search?hl=us&q=unix+vs+linux
http://www.orafaq.com/forum/t/37214/0/

Is it possible to download current Red Hat Linux for learning purpose?

Hi,
Is it possible to download current Red Hat Linux for learning purpose? On their website, you either have to purchase the regular version or download a 30-day evaluation version.
Thanks.
-c

How different is Enterprise Linux compared to Fedora?To add Sergio's post, Fedora and Enterprise Linux are based on RedHat distribution. Fedora is non commercial distribution and is very popular. Enterprise Linux is quite new (name of distribution) in the Linux world (announced at the end of october) and it is clone (as Sergio said) of RH EL 4 U4.
All I need is an opportunity to learn Unix/Linux.Any of Linux distributions will give to you this opportunity. And for learning of Linux Fedora is good enough.
Is Enterprise Linux more popular?
Popular than what? Fedora? It is too soon... (IMHO). Enterprise Linux is ideal candidate for productions systems which needs official support and (of course) systems which where Oracle products will be running on. In this scope (commmercial sphere) Enterprise Linux will become popular than Fedora (which has support only from volunteers) but I don't think that Enterprise Linux will be more popular as Fedora at all...

Oteron Linux and Oracle

Hi,
I saw that some people had some problems getting the product to install oracle on hardware having a combination of Opteron processor and linux running in 64Bits.
Is the software Redhat and/or Suse provide for the Opteron the same for Intel X86 and the software for AMD opteron the same software?
If so do I understand that the switching from 64 to 32 bits and back is performed with kernel parameters.
If the Opteron and the X86 architecture share the same linux distribution, I assume that when running an opteron in 32bit mode is not different from running the X86 architecture for as far as Oracle is considered (leaving performance issues aside).
I know it is a lot of questions, but I do find this linux distribution slightly confusing compared to UNIX where the apart from the intel architecture the issues mentioned above are less of an issue.
Rien Otterman

Said that VMWare is not certified by Oracle (for obvious reasons :-)), I agree with Nicolas (hi Nicolas), IMO VMWare is the most straighforward solution. On my laptop (Win XP) 2Gb RAM I have :
Win XP
- Oracle 10g XE Western European version
- Forms/Reports 6i (Client/Server)
Virtual machine 1 (Linux OEL 4)
- Oracle 10.2.0.1 with ASM
- Oracle 9.2.0.4
- Forms&Reports services 10.1.2.0.2
Virtual machine 2 (Linux OEL 5)
- Oracle 10.2.0.3
- Oracle 11g
- Oracle 10g XE Universal version
Not all that stuff work simultaneosly, but only because of RAM...
I had another VM with 10.2.0.1 RAC (with Virtual machine 1), but I removed it to make space for other things...
You can remove a Virtual machine at any time, it's just a directory.

File name under UNIX

Hi,
I have this problem: a part of my application is reading a file name. Sometimes the file name contains special characters: �, �.... Everything works fine when I'm testing on Windows. When I'm testing under UNIX I get '?' insteed of �. I can see that la file has a corect name on the HDD.
Why my application displays different results on Windows and UNIX?
Ex:
File f = new File("bla/bla1/bla2");
Filter filter = new Filter(".txt");
String[] files = f.list(filter);
The files array contains diferennts strings on Windos comparing to UNIX.

Que? File names are allowed to contain certain characters in windows, and another set of characters in unix.
/Kaj

Is Mac Linux?

I've tried doing a search but not really finding anything specific. Is the Mac OS based off of Linux or Unix? At the OS level it appears exactly like Linux other than the directory structures and such. Is it based off Linux or is it a completely separate OS?
Thanks,
glenn

BSD and FreeBSD are not Linux, they are Unix. NEXTSTEP was an OS based on the Mach kernel, which is a Unix kernel, and BSD Unix. OS X is derived from NEXTSTEP, and based on a Mach kernel and BSD Unix.
Linux is not Unix.

Does Oracle give a damn about the Linux comunity?

I am the technical lead on a research project that will lead to a major
implimentation in the short term future. I pushed for Oracle since it
gives the best combination of performance, reliability, features and I
thought platform options. Linux is what our developers use as our
standard workstations. We do have a few holdouts still running Windows
but not many. We have had no problem obtaining client libs and Unix
ODBC drivers for Postgress, Sybase, MySQL and amazingly enough
even MS SQL Server. Oracle defies us. We have had to purchase
3rd party drivers to access Oracle DBs through Cold Fusion and PHP.
Now we cannot even aquire a simple SQL client so that we can create
and edit our schema's. A client readily availible in windows. I am
baffled. The client software exists, but only as part of a huge download.
To split it off to a seperate download would be trivial.
A simple fact in IT is that people tend to use what they are comfortable
with. That is why you see so many Access databases out there being
used for things Access should have NEVER been considered for. If you
make it too difficult to prototype in Oracle why are people going to
impliment in it? We have a liscenced copy of Oracle. Some basic VERY
basic support given to other platforms by Oracle and offered freely by
just about any other database out there would be a really nice sign from
Oracle that they don't consider the Linux comunity with hostility.
In other words I think it is imperitive for Oracle to provide some basic
ODBC drivers (reguardless of platform, for Oracle 7 under windows
we had to purchase 3rd party ODBC drivers since those provided were
so buggy as to be unusable.) SQL Clients and a little bit of documentation
on how to setup and configure them. Of the thousands of dollars probably
going to run into millions that this project is likely to send to Oracle I don't
think it is asking much to ask for these simple things to make it POSSIBLE
to use their product.
Writing our own SQL client and or downloading the entire Oracle demo
to aquire a client which may or may not continue to work after expiration.
Then having to visit machines scattered accross 3 square miles of compound.
Getting security clearence to get INTO those buildings. It's just running me
out of time and eating away at the funding for the project. If I had a simple
tarball or rpm then I could ssh into the machines that need the product,
install it and be done with it. If I had drivers that didn't steal from the projects
funding we would have happier clients. We are going head to head against
another group that has chosen MS SQL Server as thier backend and if thier
product reachs deployment before ours it will likely mean that what is used
from our project will be ported to MS SQL Server. I'd prefer that did not
happen. I am VERY frustrated however with the lack of response from Oracle.
I've left a couple messages in the forum, asked one of thier consultants
who was onsite. Generated several emails. No response. Because we
are "Linux" users I guess that means we should be able to decompile thier
installation scripts, pick out all of the dependancies for thier SQL client
and generate our own installation then debug it. It'd be nice if I had that
much time and confidence in the demo version that it won't time out and
stop the SQL Client. It'd be nice if an Oracle rep would even send me a
list of files needed for SQL + to install.
To let me know whether the SQL plus included with Oracles
demo code would continue to run after the 90 days or whatever the expiration
date is on thier demo package.
As an interm step we've ported the schema to Postgress and MySQL and
are doing development on those DBs since we can actully TALK to them.
I am very frustrated with Oracle right now. I know the companies goal
is to absorb us and we in a very M$ mannor use all Oracle products.
Simple fact is that won't happen. Oracle in my opinion makes not only
the best DB out there, Oracle has lead the market by creating most of
the major inovations in DBs. Oracle does data like no other. I'd like to
continue using Oracle. I'd like Oracle to pay a little attention and provide
the kinds of things their competitors provide. If this is the kind of service
we get when there is compitition what will happen if there were none?
Come on, providing ODBC, JDBC drivers and a SQL Client is not asking
for much!
I'd LOVE to hear someone from Oracle respond to this. I can be reached
by email at [email protected]

Well first of all if you go out to metalink and look under product lifestyle you will find a chart that tells you what platforms are certified. If you go out there today you will see oracle 9i is certified for red hat 7.1 but withdrawn for 7.0. 8.1.7 is certified for red hat 7.1 all the way down to 6.0. As for any Oracle version lower then that why would they certify it since they aren't completly supporting 8.1.6 and below any more. There is also a chart out there as to what is being supported regarding the oracle versions and and what type of support is available. As for downloading just the sql client. I have no trouble downloading the client for most platforms. I haven't tried to down load it for linux, but I use linux for the server not the client. Also you must realize that the version out there to be downloaded is the very latest and could be riddled with bugs. As I have found in the past. Next you mention that you are the lead in a research project for the short term future and that oracle should be making oracle 7 work with linux. Are you crazy? Oracle 7 is 5-7 years old, it is old and outdated, the only reason oracle extened service on that version is because some of the os's like hp-unix stated they will support their os's that run it for 1-2 more years so oracle matched it. They aren't solving any more bugs with oracle 7, so why in the world would they certify new platforms for a version they no longer support? Also if you are developing something new why would you not use the latest and greatest of all the apps you plan on using? I've been trying for 2 years for my company to get off of oracle 7 and from your email it seems that you are starting your company off using oracle with a version that is no longer supported. As for downloading a demo, I think you are just on the wrong part of the website because I've downloaded the server and client before when moving to linux from hp-unix and didn't have any problems with download. Now there were many days where the website was down, but I've gotten useto some parts of oracle's websites being down.

Just some few Arch Linux questions

Hi, I am new to Arch Linux and am looking for some advice and answers.
Here are the questions:
1. Does the update command (I think its called pacman and it updates many things with one command in terminal) update the Arch Linux base, the DE that is installed, the apps that are installed and artwork on Arch Linux?
2. Is Arch Linux User friendly once installed (When I say user friendly, I mean something like Ubuntu)?
3. Does the drivers (Wireless card drivers, graphics card drivers, printer drivers and audio card drivers) come pre-installed once Arch Linux is installed like Ubuntu?
4. What is the stablility and speed of Arch Linux compared to Ubuntu?
That is all I need to know.
Cheers,
molom

molom wrote:Hi, I am new to Arch Linux and am looking for some advice and answers.
Here are the questions:
1. Does the update command (I think its called pacman and it updates many things with one command in terminal) update the Arch Linux base, the DE that is installed, the apps that are installed and artwork on Arch Linux?
pacman is the package manager for Arch. It will install single package, batches of packages, update the installed packages and several other things. Yes, one command 'pacman -Syu will update all the installed packages to the most recent available in the repositories. It will not update your artwork, ut everything else will be updated if you so desire.
molom wrote:2. Is Arch Linux User friendly once installed (When I say user friendly, I mean something like Ubuntu)?
Once you have installed the base systen, updated and then installed whatever desktop environment or window manager you want, whatever programs you want, etc., it will be as user friendly as you have made it.
molom wrote:3. Does the drivers (Wireless card drivers, graphics card drivers, printer drivers and audio card drivers) come pre-installed once Arch Linux is installed like Ubuntu?
As others have said, the install process does a fairly good job of detecting your hardware and installing the necessary modules, but it is up to you to install drivers for your nVidia / ATI video card if you want accelerated graphics. You'll have to install your printer (generally via cups, which you must also install). You'll have to install alsa and you may have to configure your sound.
molom wrote:4. What is the stablility and speed of Arch Linux compared to Ubuntu?
Arch is what you make it. You can have a rock solid stable system, or you can opt to be bleeding edge and risk the occasional package breaking.
molom wrote:So when you say 'pkgs', do you also mean the desktop environment as well. For example, I have E17 installed and I use the 'pacman -Syu' command, will it update the version of E17 on my PC to the current version of E17?
A package is a piece of software. E17 is a package, or perhaps a meta package made up of a bunch of packages. alsa is a package. gnome network-manager is a package. Anything that is installed on your system is managed and updated by pacman.
molom wrote:Is there something similar to synaptic in Arch Linux?
pacman is the Arch package manager. It does not need a gui front end, though there are a few third party front ends that have been written. I do not know if they are still active.
molom wrote:
I'm really eager into knowing about Arch Linux.
Cheers,
molom
Then I also suggest as other have, that you avail yourself of the wiki, especially the beginner's guide which answers several of the questions you've asked.
Arch Linux is what you make of it, but you have to do the making. Heck, that's 95% of the fun!

Linux Compared To UNIX

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