假设从网上下载了一个软件包myprog-3.0.tar.gz，存放在目录/root/rpm中，如何安装该软件包？完成安装后，如果又不想要它了，如何卸载或删除该软件包？请分别写出安装和删除该软件包的步骤和命令。

A.PPP

B.UUCP

C.SLIP

D.Ethernet

A.ARP

B.NFS

C.DHCP

D.DDNS

A.The X session file

B.The X setup_0 file

C.The X start_up file

D.The Give Console file

A./etc/nfs

B./etc/nfs.conf

C./etc/exports

D./etc/netdir

A./etc/exports

B./etc/smb.conf

C./etc/samba/config

D./usr/local/samba.cfg

A.once a day from cron

B.once a week from cron

C.after installing a new kernel

D.after installing a new module

A.lpflush

B.lprm-

C.lpclear

D.lprmall

A.lsmod

B.dirmod

C.modules

D.modlist

A.cat/proc/ioports

B.cat/proc/interrupts

C.cat/proc/memoryinfo

D.which interrupts

A.~/mail/

B./var/mail/

C./var/mail/spool/

D./var/spool/mail/