Linux Quiz

[shn]

Originally posted by leftism+20 February 2004 - 09:53--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (leftism &#064; 20 February 2004 - 09:53)</td></tr><tr><td id='QUOTE'><!--QuoteBegin-shn
In vi, what does this expression yield /^[a-zA-Z]/

It searches for non-alphabetic characters?

Assuming I got it right, (fingers crossed ) What command would you issue to block all incoming packets to port 80 (TCP) ?[/b][/quote]
/^[a-zA-Z]/ Matches if the line starts with any letter

iptables -A INPUT -p tcp --dport 80 -j DROP

[leftism]

iptables -A INPUT -i ppp0 -p tcp 80

Probably not right...I just read a little bit from the man page of iptables

close

iptables -A INPUT -p tcp --dport 80 -j DROP

You should specify the interface if your on a host with multiple interfaces but since I&#39;m not, I never do.

[leftism]

Originally posted by shn
/^[a-zA-Z]/ Matches if the line starts with any letter

You sure dude? I thought the ^ meant not?

[shn]

Originally posted by leftism+20 February 2004 - 10:17--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (leftism &#064; 20 February 2004 - 10:17)</td></tr><tr><td id='QUOTE'><!--QuoteBegin-shn
/^[a-zA-Z]/ Matches if the line starts with any letter

You sure dude? I thought the ^ meant not?[/b][/quote]
I am sure.

You are welcomed to prove me otherwise. Im sure vi has some handy documentation on regular expressions that you can browse.

[LSA]

Originally posted by shn+20 February 2004 - 10:27--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (shn @ 20 February 2004 - 10:27)</td></tr><tr><td id='QUOTE'>

Originally posted by leftism@20 February 2004 - 10:17
<!--QuoteBegin-shn

/^[a-zA-Z]/ Matches if the line starts with any letter

You sure dude? I thought the ^ meant not?

I am sure.

You are welcomed to prove me otherwise. Im sure vi has some handy documentation on regular expressions that you can browse. [/b][/quote]
I wouldn&#39;t mess with shn, she&#39;ll take you down, right down to china town&#33;



Just kidding

New question:

Give a command to display info about your cpu.

[shn]

Originally posted by LSA+20 February 2004 - 10:34--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (LSA &#064; 20 February 2004 - 10:34)</td></tr><tr><td id='QUOTE'>

Originally posted by shn+20 February 2004 - 10:27--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (shn &#064; 20 February 2004 - 10:27)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-leftism@20 February 2004 - 10:17
<!--QuoteBegin-shn

/^[a-zA-Z]/ Matches if the line starts with any letter

You sure dude? I thought the ^ meant not?

I am sure.

You are welcomed to prove me otherwise. Im sure vi has some handy documentation on regular expressions that you can browse. [/b][/quote]
I wouldn&#39;t mess with shn, she&#39;ll take you down, right down to china town&#33;



Just kidding

New question:

Give a command to display info about your cpu.[/b][/quote]


I only went by my use of vi. I have dealt with regular expressions but am no expert in them as they are a bit tricky to specify, but my answer was purely off the top of my head. If I am wrong I would like to know because this is not a competition..

[leftism]

hehe I never could resist a challenge

[^]&nbsp; &nbsp; &nbsp; &nbsp; Matches anything not enclosed after the not character.

Example

Ver[^1-9]&nbsp; Matches Ver followed by any non digit.

source

edit:

Originally posted by shn
I only went by my use of vi. I have dealt with regular expressions but am no expert in them as they are a bit tricky to specify, but my answer was purely off the top of my head. If I am wrong I would like to know because this is not a competition..

Thats cool

I dont have a problem with being wrong sometimes or speaking to people who know more than me. (Although I try to avoid the former )

If I did I wouldnt use linux at all

[shn]

Then challenge we shall.

Just keep it clean

[LSA]

Originally posted by shn@20 February 2004 - 10:43
I only went by my use of vi. I have dealt with regular expressions but am no expert in them as they are a bit tricky to specify, but my answer was purely off the top of my head. If I am wrong I would like to know because this is not a competition..

I was just kidding

I don&#39;t know anything about vi

[shn]

Originally posted by leftism+20 February 2004 - 10:44--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (leftism @ 20 February 2004 - 10:44)</td></tr><tr><td id='QUOTE'> hehe I never could resist a challenge

[^]&nbsp; &nbsp; &nbsp; &nbsp; Matches anything not enclosed after the not character.

Example

Ver[^1-9]&nbsp; Matches Ver followed by any non digit.

source

edit:

<!--QuoteBegin-shn
I only went by my use of vi. I have dealt with regular expressions but am no expert in them as they are a bit tricky to specify, but my answer was purely off the top of my head. If I am wrong I would like to know because this is not a competition..

Thats cool

I dont have a problem with being wrong sometimes or speaking to people who know more than me. (Although I try to avoid the former )

If I did I wouldnt use linux at all [/b][/quote]
To be honest our Linux community here is relatively small. Welcome aboard