r_dwssap.sh

cat /etc/passwd | sed -e 's/#.*//' -e 's/[ ^I]*$//' -e '/^$/ d' -e 's/:.*//g' \
| tr '\n' ',' | rev | tr "," "\n" | sort -r | tr "\n" ","  \
| sed -e 's/, */, /g' -e 's/.$//' -e 's/.\{3\}$//'


• Write a command line that displays the output of a cat /etc/passwd command,
removing comments, every other line starting from the second line, reversing each login, sorted in reverse alphabetical order, and keeping only logins between FT_LINE1
and FT_LINE2 included, and they must separated by ", " (without quotation
marks), and the output must end with a ".".



cat /etc/passwd | sed -e 's/#.*//' -e 's/[ ^I]*$//' -e '/^$/ d' -e 's/:.*//g' \
| awk 'NR%2==1' \
| rev \
| sort -r \
| awk 'NR>=FT_LINE1 && NR<=FT_LINE2' \
| tr '\n' ',' \
| sed -e 's/, */, /g' -e 's/.$//' \
| sed 's/$/./'