Commands by unixmonkey5411 (1)

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print all except first collumn

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"

Watch Al Jazeera Livestream directly in mplayer #jan25
One cannot call the high quality livestream directly, but command this gives you a session ID and the high quality stream. #egypt #jan25

Show top 50 running processes ordered by highest memory/cpu usage refreshing every 1s
http://alvinalexander.com/linux/unix-linux-process-memory-sort-ps-command-cpu for an overview of --sort available values

Define a quick calculator function
POSIX compliant arithmetic evaluation. = 10*2+3

backup local MySQL database into a folder and removes older then 5 days backups

list files recursively by size

print file without duplicated lines usind awk
show file withou duplicated lines

floating point operations in shell scripts
using bc is for sissies. dc is much better :-D Polish notation will rule the world...

Print process run time, average CPU usage, and maximum memory usage on exit
Bash has a built-in time command which provides less functionality than the real time command. Thus we reference /usr/bin/time directly. Since the command isn't very easy to remember you could alias it to something like "cputime" or even just "time".

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