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username and uid sorted by uid
cut, sort, tr
cut -d ':' -f 1,3 /etc/passwd | sort -t ':' -k2n - | tr ':' '\t'
unique words
tr, sed, uniq
tr -c a-zA-Z '\n' > Readme1.txt | sed '/^$/d' | sort | uniq -i -c
join 2 files where 1 not sorted
sort, join
sort m1.txt | join - m2.txt
memory hog
ps, awk, sort
ps aux | awk '{if ($5 != 0 ) print $2,$5,$6,$11}' | sort -k2n
top 10 largest files || dirs
du, sort, head
du -sk /var/log/* | sort -r -n | head -10
10 most used commands
cat, tr, sed
cat ~/.bash_history | tr "\|\;" "\n" | sed -e "s/^ //g" | cut -d " "
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