Manage processes in Linux (Ubuntu)

linux-process-mgmt.txt

// Easiest way to find out what processes are running
$ top

// Improved version of top. Install on ubuntu as:
$ sudo apt-get install htop
// run htop same as top
$ htop

// Listing running process with ps
// ps itself won't show much
$ ps 
// this will show pretty much every process
$ ps aux  
// filter output with grep
$ ps aux | grep init  
// show processes in a hierarchical relationship
$ ps axjf

// Simple way to find the PID of a process is pgrep
$ pgrep init

// Kill a process by id (where PID is the process ID number)
$ kill PID
// If it won't go add some oomph
$ kill -KILL PID

// Kill an established TCP connection
// first identify the remote port you like to kill
$ netstat -n | grep 5002
tcp        0  45021 192.168.0.64:5002       192.168.0.129:50826     ESTABLISHED
// second identify the inteface
$ netstat -in
Kernel Interface table
Iface   MTU Met   RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
**eth1**       1500 0  32397808      0     91 0      109544268      0      0      0 BMRU
lo        65536 0     86298      0      0 0         86298      0      0      0 LRU
wlan0      1500 0    253441      0      0 0        151715 108899      0      0 BMU
// call tcpkill with interface and port
$ sudo tcpkill -i eth1 port 5002