1.将/etc/passwd 中第一个字段（用户名）截取到user文件中
[root@localhost ~]# cut -d : -f 1 /etc/passwd | tee /user
root
bin
daemon
adm
lp
sync
shutdown
halt
mail
operator
games
ftp
nobody
dbus
systemd-coredump
systemd-resolve
tss
polkitd
geoclue
rtkit
pulse
libstoragemgmt
qemu
usbmuxd
unbound
rpc
gluster
chrony
setroubleshoot
pipewire
saslauth
dnsmasq
radvd
clevis
cockpit-ws
cockpit-wsinstance
sssd
flatpak
colord
gdm
rpcuser
gnome-initial-setup
sshd
avahi
rngd
tcpdump
redhat
[root@localhost ~]#
[root@localhost ~]# cat /user
root
bin
daemon
adm
lp
sync
shutdown
halt
mail
operator
games
ftp
nobody
dbus
systemd-coredump
systemd-resolve
tss
polkitd
geoclue
rtkit
pulse
libstoragemgmt
qemu
usbmuxd
unbound
rpc
gluster
chrony
setroubleshoot
pipewire
saslauth
dnsmasq
radvd
clevis
cockpit-ws
cockpit-wsinstance
sssd
flatpak
colord
gdm
rpcuser
gnome-initial-setup
sshd
avahi
rngd
tcpdump
redhat
2.将3，4 字段分别截取出来写入文件UID和文件GIU但是要使这两个文件中的信息
是以数值由大到小的形式显示；
[root@localhost ~]# cut -d : -f 3 /etc/passwd | sort -n -r | tee /UID
[root@localhost ~]# cut -d : -f 4 /etc/passwd | sort -n -r | tee /GID
3.通过查看时间命令将分别将年月日时分写入A文件，将当前显示为星期几追加写
入A文件。或者在屏幕上输出“the day is (星期几)”。
4.通过多种方式在base.repo文件编写以下内容
[AppStream]
name=AppStream
baseurl=file:///mnt/AppStream
gpgcheck=0
enabled=1
方法1：
[root@localhost ~]# vim /base.repo
[root@localhost ~]#
[root@localhost ~]# cat /base.repo
[AppStream]
name=AppStream
baseurl=file:///mnt/AppStream
gpgcheck=0
enabled=1
方法2：
echo [AppStream] >> /base.repo
[root@localhost ~]# echo name=AppStream >> /base.repo
[root@localhost ~]# echo baseurl=file:///mnt/AppStream >> /base.repo
[root@localhost ~]# echo gpgcheck=0 >> /base.repo
[root@localhost ~]# echo enabled=1 >> /base.repo
[root@localhost ~]# cat /base.repo
A
name=AppStream
baseurl=file:///mnt/AppStream
gpgcheck=0
enabled=1
方法3：
nano /base.repo
[root@localhost ~]# cat /base.repo
[AppStream]
name=AppStream
baseurl=file:///mnt/AppStream
gpgcheck=0
enabled=1
5.下载linux版qq程序在当前主机的/test目录，链接地址
https://down.qq.com/qqweb/LinuxQQ/linuxqq2.0.0-b2-1089x86_64.rpm
wget -c -P/test https://down.qq.com/qqweb/LinuxQQ/linuxqq2.0.0-b2-1089x86_64.rpm
