1. grep -E "economica.*Sun" last.fake | awk -F ' ' '{print $1}' | sort | uniq
2. cat last.fake | awk -F " " '{if ($7>"23:00") print $1}' | sort | uniq
3. cat passwd.fake | awk -F ":" '{if($3%7==0) print $5}' | grep -E "^M" | sort | uniq
4. grep -E "^root" ps.fake | awk -F ' ' '{print $6}' | sort | uniq
5. grep -E '^.*88:x:' passwd.fake | awk -F ':' '{print $5}'
6. grep -E '^.*:x:23[0-9]' passwd.fake | awk -F ':' '{print $5}'
7. grep -E "^t" last.fake | awk -F ' ' '{if($2 == "pts/9") print $1}' | sort | uniq
8. grep -E "^r" ps.fake | awk -F ' ' '{print $1}' | sort | uniq | sed 's/\([aeiou]\)/\1\1/g'
9. cat passwd.fake | sed 's/[a-zA-Z0-9 ]//g' | sort | uniq
10. cat passwd.fake | sed 's/[^r]//g' | sort | uniq
11. awk -F " " 'BEGIN{s=0;p=0}{s=s+$2;p=p+1}END{print s/p}' ps.fake
