Basic questions on Ubuntu

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Sridhar_Rao

In the zone
Sorry, if this question is redundant. Since I am new to linux (recently installed ubuntu) I want answer to these three questions, I am aware that linux is a safe OS.

1) Is there absolutely no requirement for a firewall as well as a antivirus program?
2) Can I surf the net without fear of any kind?
3) Is linux totally fool-proof to keyloggers and rootkits?

Is there any security related tip you might want to give me?
 
Yes Yes and Yes
Although there are some companies inve$ting in AV$ for Linux, there are a handful of viruses, but they can ONLY cause the smallest, repairable damage to your system AFAIK
My tip: Dont go on looking for you-know-what you-know-where and you'll be fine :D
 

Garbage

God of Mistakes...
You CAN use Firewall..
You CAN install AntiVirus...
Unless you gives your username / passwords / names / emails freely on Internet, you can surf without fear on Linux...

I've never used Firewall, Antivirus on Linux. n Still feeling safe... :)
 
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Sridhar_Rao

Sridhar_Rao

In the zone
Ok fine, so it is ok to have them installed (...just in case!!), but which ones and where can I download them? Also do let me know how to install them too.
 

Cool G5

Conversation Architect
Ok fine, so it is ok to have them installed (...just in case!!), but which ones and where can I download them? Also do let me know how to install them too.

You seem to be unsatisfied with the replies :razz:

There is absolutely no need of firewall or an antivirus as said by many above.
Also the antivirus packages for linux are not that effective. Another reason is linux viruses are not so common, even if you get infected(very rare -0.01%) the virus won't be that strong to do any great damage.

Inspite of the above, if you wish to purchase an antivirus look at various software vendors like Mcafee etc.
 

ray|raven

Think Zen.
^Precisely , as long as you dont run around browsing as root , and installing stuff you dont know is good , you're Gold.

And why waste resources on AV/Firewall? Linux is like a damn fortress , no one can take it down unless you give out the damn secrets. :p
 
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Sridhar_Rao

Sridhar_Rao

In the zone
OK, I am now convinced that there is no need for a firewall or antivirus. I now believe that nothing can be installed on a linux machine without user permission (unlike windows), hence there is no chance of any malware or virus getting installed without my permission, am I right? If so, can I be tricked into installing it due to my ignorance of linux. I don't even know which rights I have.
as long as you dont run around browsing as root
I don't even know if I am in root or not, in fact I am not aware "where am I". Please educate me.:(
 
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QwertyManiac

Commander in Chief
You can "install" things as a normal user, but no process can go root unless you start it as root, unless its using some exploit, in which case there are security updates rolling in almost the next day.

Plainly said, a root user is the one whose id is root. ;)
 
A

anarchist

Guest
@Sridhar_Rao: ^ and as you are using ubuntu, there is no root user by default.
details here:
*help.ubuntu.com/community/RootSudo
 

Garbage

God of Mistakes...
Yeh... Ubuntu don't have root user. To perform any command as root just preceed that command with "sudo". It will ask password.

So, just be fearless, n use Linux. The Future is Open ! :)
 
Yeah Shridhar_Rao
With Linux here you have nothing to fear :)
Just install those FireFox Addons which NucleusKore mentioned if you are still worried about net security and you'll be good to go :wink:
 

NucleusKore

TheSaint
And if you have any more basic questions please refer these before asking
*www.funnestra.org/ubuntu/hardy/
*ubuntuguide.org/wiki/Ubuntu:Hardy
 
Sorry, if this question is redundant. Since I am new to linux (recently installed ubuntu) I want answer to these three questions, I am aware that linux is a safe OS.

1) Is there absolutely no requirement for a firewall as well as a antivirus program?
2) Can I surf the net without fear of any kind?
3) Is linux totally fool-proof to keyloggers and rootkits?

Is there any security related tip you might want to give me?
1. You DO need a firewall. But not an antivirus. Still, by default, there is already good security set for you in Ubuntu.

2. You can still be targeted by email scams, phishing sites, etc since their blocking is dependant on the brains of the user, not the OS. You can try some good firefox security extentions however, to get rid of some internet issues.

3. Unless you are foolish enough to install them yourself using sudo command, yes it is. Then again, running scripts blindly as root is the worst possible thing you can do. NEVER run scripts using sudo when you have not got them from trustable sources.
 
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Sridhar_Rao

Sridhar_Rao

In the zone
Thank you so much! :grin:

Agreed Linux is a fortress and nothing can be installed without permission. Since I don't know linux commands, I am not going to use sudo command for anything without knowing what it might do. I shall use only synaptic manager to install any application. I have installed script blocker to firefox. I shall be careful about the websites I visit. By the way, isn't there a phising filter in firefox (like in IE)?

You DO need a firewall. But not an antivirus.
This is what I found on use of a firewall @ *www.funnestra.org/ubuntu/hardy/#ufw
Although the Linux kernel has a built-in firewall, it is turned off by default since Ubuntu installs in such a way that no ports are listened to by any program or process. Since nothing is listening to any of the ports, there is no need for a firewall. However, once you enable something like file or printer sharing, remote desktop, etc., processes will start to listen to some of the ports for external connections. You should therefore enable the firewall and create rules to restrict access of the appropriate ports to the IP addresses of the desired set of machines.
Regular updates, firefox and evolution mail use internet connection, so I probably won't need a firewall, right?
Antivirus is not required, (I am convinced) but IF anyone still needs one, Avast has it.
*www.avast.com/eng/download-avast-for-linux-edition.html

And if you have any more basic questions please refer these before asking
*www.funnestra.org/ubuntu/hardy/
*ubuntuguide.org/wiki/Ubuntu:Hardy
Thank you so much, I was looking for something like this.:)
 
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QwertyManiac

Commander in Chief
Yes Firefox 3+ has an anti-phishing tool in it, which works with Google's constantly updated lists.

You might need a firewall to manage certain ports (open or close), to deny IPs incoming (attacks/visits to webserver) or outgoing (Filters?). A frontend like UFW makes these tasks easier on Ubuntu I believe.
 
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Sridhar_Rao

Sridhar_Rao

In the zone
I just realized while searching through synaptic manager that UFW 0.16.2.3 is already installed on my system. I don't know if it is activated or not, how do I know that.

Should I do these:
Enable the firewall and set the default rule to deny incoming connections to all ports:
sudo ufw enable
sudo ufw default deny
 
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