Sunday, March 28, 2010

Linux - Trick

Tý trick nho nhỏ:
    /etc/issue ( before)
    /etc/motd (after)
    #Banner ... SSH Banner
    Tra ve user dang login
netstat -nlp -ntlp -nulp
    Show Listening socket
    Show listen port va cac connect toi
    lsof -i :53
    -c number : ping với số lần
    -s size
    -i s    : khoảng cách giữa các đợt
    #tcpdump -D : Network interfaces available for the capture
    #tcpdump -n : To display numerical addresses rather than symbolic (DNS) addresses
    tcpdump -i eth0
    #tcpdump udp
    #tcpdump port http
    #tcpdump -c 20 : To stop the capture after 20 packets
    #tcpdump -w capture.log 
Sử dụng vim tìm kiếm: / sau hoặc ? trước, n để next
:set number                show lines
:set number                hide lines

:0                        go to first line
:$                        go to end line
Mình dùg vim, ko biết nano
Thanks for reading
All my Lab:
Linux Lab -- window and Cisco Lab
to be continued - I will update more. 

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