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Terminal redirection
can display the commands and their output to another user who is connected to another terminal, by example pts/3

Pull Total Memory Usage In Virtual Environment
This command basically adds up all of the individual instances processes and gives you a grand total for used memory in that instance alone.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

check open ports without netstat or lsof

Console clock
Shows a simple clock in the console -t param removes the watch header Ctrl-c to exit

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Find the package that installed a command

Execute a command with a timeout
A timeout is great, but what if the command is taking longer than expected because it's hung up or ran into some other problem? That's where the -k option comes in. Run "some_command" and timeout after 30s. If the command is still running after 1 minute, it will receive a kill signal.

grep processes list avoiding the grep itself
Trick to avoid the form: grep process | grep - v grep

check open ports without netstat or lsof


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