我在这里有点新，所以如果你不明白我的问题，请原谅（在评论中留下你可能需要的其他详细信息）
我可以连接到家里的 wifi，但是我不能连接到任何其他 wifi。我已经测试了我的手机热点、办公室 wifi。
网络的一些细节（我不确定它们是否相关）
cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 ayaz
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
cat /etc/resolv.conf
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "systemd-resolve --status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.
nameserver 127.0.0.53
options edns0
cat /etc/nsswitch.conf
# /etc/nsswitch.conf
#
# Example configuration of GNU Name Service Switch functionality.
# If you have the `glibc-doc-reference' and `info' packages installed, try:
# `info libc "Name Service Switch"' for information about this file.
passwd: compat systemd
group: compat systemd
shadow: compat
gshadow: files
hosts: files mdns4_minimal [NOTFOUND=return] dns
networks: files
protocols: db files
services: db files
ethers: db files
rpc: db files
netgroup: nis
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic
感谢大家的贡献！:)
答案1
可能有些误解。这是我的桌面的样子。按下“选择网络”后，您应该会看到一个列表，然后选择，系统可能会提示您输入必须拥有的密码。
答案2
谢谢大家的贡献。
我已经通过转到菜单 > 首选项 > 解决了我的问题网络连接> 点击+> 选择网络类型（Wifi） > 提供与网络名称相同的连接名称和 SSID > 在 wifi-security 选项卡中输入密码（即网络密码） > 单击保存
等了一会儿后，它就连接到了我的 wifi，这是一次很棒的体验
我无法频繁使用右下角的选项连接到 Wi-Fi。