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Watch TCP, UDP open ports in real time with socket summary.

Increase mplayer maximum volume
use '0' and '9' to increase/decrease volume. this is useful on laptops with low speaker volume.

Send an email from the terminal when job finishes
Might as well include the status code it exited with so you know right away if it failed or not.

Top 10 Memory Consuming Processes

Use Kernighan & Ritchie coding style in C program

Download all manuals RedHat 7 (CentOS/Fedora) with one command in Linux

Better git diff, word delimited and colorized
Define a git alias then git dcolor

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"

Kill any process with one command using program name
Somtime one wants to kill process not by name of executable, but by a parameter name. In such cases killall is not suitable method.

Kill all processes that listen to ports begin with 50 (50, 50x, 50xxx,...)
Run netstat as root (via sudo) to get the ID of the process listening on the desired socket. Use awk to 1) match the entry that is the listening socket, 2) matching the exact port (bounded by leading colon and end of column), 3) remove the trailing slash and process name from the last column, and finally 4) use the system(…) command to call kill to terminate the process. Two direct commands, netstat & awk, and one forked call to kill. This does kill the specific port instead of any port that starts with 50. I consider this to be safer.


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