2021/Oneliners/ about blog

[joslinpr]

Clever! I use the "sort | uniq -c | sort -n" idiom often.
Number of threads and processes by user:
ps -Teo user | sort | uniq -c | sort -n | tail
Breaking it out by commands:
ps -Teo user,comm | sort | uniq -c | sort -n | tail

Two other idioms:
Using wc -l to count things
ps -ef | wc -l
Adding "tee /tmp/Results.$$" to save the output of commands
ps -ef | grep [Nn]ginx | tee /tmp/Results$$. # Use "grep [Nn]ginx" so you don't match the grep!

Using fold to convert words to lines:
fold -w1 Textfile | sort | uniq -c | sort -nr | head # create a frequency table for Textfile.