In toronto VM$,$ using rpm command,

a$.$ Query all installed packages using rpm and rpmquery command

b$.$ Find whether the specified package perl, quota, postfix and httpd is installed $($SCREENSHOT$)$

c$.$ List all files in the package for quota, perl, postfix and httpd

d$.$ List documentation files in a quota, perl, postfix and httpd packages

e$.$ Identify package associated with the command vim, passwd, useradd, adduser, ls $,$ chage

f$.$ Find the package associated with the files $/$etc$/$passwd$,/$etc$/$group$,/$etc$/$shadow$,/$etc$/$hosts