commands.txt

cp /etc/services .

grep "^#" services > services_comments.txt

cat services | sed '/^\(#\|[[:space:]]*$\)/d;s/#.*//g' > services_wo_comments.txt

cat services | sed '/^\(#\|[[:space:]]*$\)/d;s/#.*//g' | grep udp >> services_udp.txt

vi services_wo_comments.txt
 /socks
 :+,$d
 :w well-known-ports.txt

sed -n 1,100p well-known-ports.txt | sed "s/\//-/" > 100-well-known-ports.txt
#1
cat > doc1.txt << EOF
10-IT-HQ
20-Accounting-HQ
30-Help-Desk-Remote
40-Sales-HQ
EOF
#2
echo "10-IT-HQ" > doc1.txt
echo "20-Accounting-HQ" >> doc1.txt
echo "30-Help-Desk-Remote" >> doc1.txt
echo "40-Sales-HQ" >> doc1.txt
#1
cat > doc2.txt << EOF
10-B.Thomas
20-J.Foster
30-G.Smith
40-F.Hudson
EOF
#2
echo "10-B.Thomas" > doc2.txt
echo "20-J.Foster" >> doc2.txt
echo "30-G.Smith" >> doc2.txt
echo "40-F.Hudson" >> doc2.txt

cat doc1.txt doc2.txt > doc3.txt

find /etc -type f -size -200c -exec ls -al {} \; | tee small_etc_files.txt

#1
cat doc3.txt | cut -d ' ' -f 3 | sort -u
#2
awk < doc3.txt '{print $1}' | sort -u

cat doc3.txt| uniq -c | tee locations.txt


ПС: Не съм напълно сигурен дали съм разбрал правилно условията, но това е което знам и мога.