Command netstat -na | awk ‘$1==”tcp” || $1==”udp” {print $4}’ | cut -d: -f2 | uniq -c | sort -k 1,1n -k 2,2n show all ports but it is every complicated to understand and recall
command given in post is simple to understand also single quotes issue is corrected in post so you can copy command from blog and run in shell.

Lesson learned, do not copy command from blog and run in shell or maybe even paste in text editor.

LOL

Thanks very much for the pointer abcuser and brining it to my attention, did not notice that subtle difference at all. I did change the quote characters and the commands do work.

netstat -na | awk ‘$1==”tcp” || $1==”udp” {print $4}’ | cut -d: -f2 | uniq -c | sort -k 1,1n -k 2,2n

1 111
1 111
1 631
1 631
1 868
1 892
1 895
1 898
1 5353
1 5433
1 32770
1 32771
1 44774

I guess it a writers blog as oppose to a scripting language blog, if there is such a thing

Thanks again abcuser

PEACE

So character ‘ or ’ is single quote and character ” is double quote. Replace this two characters with correct one from keyboard.

[code]netstat -na | awk ‘$1==”tcp” || $1==”udp” {print $4}’ | cut -d: -f2 | uniq -c | sort -k 1,1n -k 2,2n[/code]

The authors example, and most of the responders corrections, threw errors.

Author example
netstat -nap | grep ‘tcp\|udp’ | awk ‘{print $4}’ | cut -d: -f2 | sort | uniq -c | awk ‘{print $2}’

awk: ‘{print
awk: ^ invalid char ‘?’ in expression
awk: ‘{print
awk: ^ invalid char ‘?’ in expression
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
warning, got bogus unix line.

Responders corrections
Jondor correction
netstat -nap | grep ‘tcp\|udp’ | awk ‘{print $4}’ | cut -d: -f2 | sort | uniq -c | sort -n
awk: ‘{print
awk: ^ invalid char ‘?’ in expression
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
warning, got bogus unix line.

abcuser correction

netstat -na | awk ‘$1==”tcp” || $1==”udp” {print $4}’ | cut -d: -f2 | uniq -c | sort -k 1,1n -k 2,2n

awk: ‘==”tcp”
awk: ^ invalid char ‘?’ in expression
warning, got bogus unix line.
bash: ==”udp”: command not found

This is the only one that worked.
netstat -putwlan

I guess it is a learning process when it is all said and done. But bogus commands make reading these type of blogs untrustworthy, and i wonder if they were tested before being posted.

PEACE