2007-May-8 - Common Linux applications - vim, samba, iptables, squid

1. vim / vi  -- text file editing

* To open vim:

     run the following command:

     vim {file_name}

  If the file with {file_name} does not exist, it will create a new file with the name.

* To enter edit mode:

     press Insert or I

* To switch Insert / Replace:

     in edit mode press Insert

* To input long command (eg. wq):

     in command mode press :

* To exit edit mode or to input short command (eg. q):

     press Esc

* To delete a character:

     in command mode press X or Delete

* To scroll to the top of the file:

     in command mode press GG

* To scroll to the end of the file:

     in command mode press Shift+G

* To go down one page:

     in command mode press Ctrl+F

* To go up one page:

     in command mode press Ctrl+B

* To save & quit:

     :wq

* To quit without save:

     :q!

* To search a string:

     /{string}

* To find next:

     n

2. samba -- share folders

Quick started guide:

1) Open /etc/samba/smb.conf to do related configuration of the shared folder. Refer to the examples in the file.

2) Search "security=", and change its value to "share" (ie. security = share).

3) Save and close the file.

4) Add current user, run command:

     smbpasswd -a

5) Run:

     /etc/init.d/smb start

Done.

3. iptables -- linux firewall, packet filter

http://www.netfilter.org/documentation/index.html#documentation-howto

4. squid -- linux proxy

http://www.squid-cache.org/