see explanation below.
Explanation
* rpm -ivh ftp://server1/example.com/pub/updates/zsh-*
or
* Login to ftp server : ftp ftp://server1.example.com using anonymous user.
* Change the directory: cd pub and cd updates
* Download the package: mget zsh-*
* Quit from the ftp prompt : bye
* Install the package
* rpm -ivh zsh-*
* Verify either package is installed or not : rpm -q zsh

see explanation below.
Explanation
* chmod g+s /archive
* Verify using: ls -ld /archive Permission should be like:
drwxrws--- 2 root sysuser 4096 Mar 16 18:08 /archive
If SGID bit is set on directory then who every users creates the files on directory group owner automatically the owner of parent directory.
To set the SGID bit: chmod g+s directory
To Remove the SGID bit: chmod g-s directory

see explanation below.
Explanation
crontab -u mary -e
23 14 * * * echo "Hello World."

see explanation below.
Explanation
mkdir -p /mnt/iso
/etc/fstab:
/root/examine.iso /mnt/iso iso9660 loop 0 0 mount -a
mount | grep examine