Find and Kill the process that consumes more memory

How do I find what process/service is consuming more memory and how do I kill/terminate it on Ubuntu Server?
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Use "top":

1. run top
2. order by memory usage by pressing "m"
3. kill the process by:
   - pressing "k"
   - entering the process ID (look at that column)
   - chose the kill "signal"
        15 is "terminate".  If that doesn't work try
        6 is abort.  If that doesn't work try
        9 unconditional kill.

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Use the ps command
ps aux
this will display all the processes with there memory usage in percentage.
Kill the process by its pid
kill -15 pid (terminate)
or kill -9 pid (force to kill)
Thyagaraj03Author Commented:
yes it's good. Is there any other way so that I have only listed the process that consumes more memory?
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ps aux|sort -nr +3

this will sort all the processes based on memory usage....
Thyagaraj03Author Commented:
When I ran the command "ps aux|sort -nr +3" I got the following output:
sort: open failed: +3: No such file or directory
try  ps aux --sort -rss
Thyagaraj03Author Commented:
It is solved
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