简单it，简单生活

    在安装软件之前，先进入windows连接上校园网，在不断开连接的情况下重新启动电脑进入ubuntu，这样你就有一个小时的上网时间。也就是说，服务器一个小时后才会发现你没有使用客户端，从而断开你的网络。让ubuntu连上网络能更好的安装软件。
打开终端，输入命令：

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sudo apt-get install openssl

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sudo apt-get install xsupplicant

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sudo cp /etc/xsupplicant/xsupplicant.conf /etc/xsupplicant/xsupplicant_bk.txt

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sudo gedit /etc/xsupplicant/xsupplicant.conf

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# This is an example configuration file for xsupplicant versions after 0.8b.

### GLOBAL SECTION

# network_list: defines all of the networks in this file which
#     should be kept in memory and used.Comma delimited list or "all"
#     for keeping all defined configurations in memory. For efficiency,
#     keep only the networks you might roam to in memory.
#     To avoid errors, make sure your default network is always
#     in the network_list. In general, you will want to leave this set to
#     "all".

network_list = all
#network_list = default, test1, test2

# default_netname: some users may actually have a network named "default".
#     since "default" is a keyword in the network section below, you can
#     change which is to be used as the replacement for this keyword
#
# As of Xsupplicant 1.2.2, wireless interfaces will no longer use the default
# network name if they are unable to find a valid config. If you have
# auto association turned on, Xsupplicant will find a new network to connect
# to. Otherwise, it will do nothing.

default_netname = default
#default_netname = my_defaults

# destination: defines how Xsupplicant should determine the destination address
# that should be used for the 802.1X conversation.
#
# Valid Options are :
#   Auto - respond to source address from the last packet we saw.
#   Source - same as Auto
#   BSSID - Always answer to the BSSID of the AP we are associated to.
#   Multicast - always use the multicast address defined in 802.1X-2001.
#
#destination = auto

# Do we want xsupplicant to pick the best AP to connect to? Or should the
# 'firmware' be allowed to select the AP? (In most cases, letting Xsupplicant
# make the decision for you is currently better.)
#roaming = xsupplicant

# Should we do passive scanning while associated/authenticated with an AP?
# In order to support preauthentication, this *MUST* be enabled. However,
# some wireless cards don't do passive scanning correctly, and will end up
# disconnecting you from the network while a scan is completed.
#passive_scanning = yes

# The amount of time (in seconds) that should pass between passive scan
# attempts. When the scan is commplete, Xsupplicant will make a decision
# about which AP is the best. If a better AP is found, Xsupplicant will
# jump to it. If 'passive_scanning' is set to 'no', then this setting does
# nothing.
#passive_timer = 300

# EAP request identity messages may contain a network id field in it. This
# network ID can be useful for determining a network name on wired networks.
# For wireless networks, this ID usually matches the SSID so leaving it
# enabled is a good idea unless you have a reason not to.
# use_eap_hints = yes

# When running in daemon, or non-foreground mode, you may want to have the
# output of the program. So, define a log file here. Each time XSupplicant
# is started, this file will be replaced. So, there is no need to roll the
# log file. If the logfile name is set to "syslog", then all messages will
# be sent to the syslog. If syslog is defined, you should also define
# "log_facility" to specify which logging facility will be used.
#logfile = /data/xsupplicant.log

# If you have set the logfile option to "syslog", then you should define
# log_facility in order to tell Xsupplicant where to send log messages.
# Valid settings are cron, daemon, ftp, kern, local0, local1, local2,
# local3, local4, local5, local6, local7, lpr, news, user, and uucp
# log_facility = daemon

# If we want Xsupplicant to control the associations for networks, we need
# to set the following setting to "auto". If you want to control the network
# you connect to via iwconfig (or other SSID setting utility) you should set
# this option to manual. The default is auto.
#association = auto

# This value should be changed to reflect how long it takes your card to
# determine if it is associated. (Basically, the value should be the number
# of seconds it takes for your card to scan every possible frequency and
# speed it is aware of.) For most cards, 30 seconds is enough time. However
# if your card is capable of doing 802.11a/b/g, you may need to set this
# value higher.

#association_timeout = 30

# The auth_period, held_period, and max_starts modify the timers in the state
# machine. (Please reference the 802.1x spec for info on how they are used.)
# For most people, there is no reason to define these values, as the defaults
# should work.

#auth_period = 30

#held_period = 30

#max_starts = 3

# The "default_interface" is the interface that will be used if one is not
# specified on the command line.

#default_interface = eth1

# Enable or disable friendly warnings. The default setting is "yes".

# friendly_warnings = no

# The stale key timeout is how long a unicast key should be in use before a
# warning is issued. It doesn't actually change the way the program functions
# and should be considered cosmetic. However, it may be useful to put this
# to a lower value if you believe that WEP keys can be broken quicker than the
# default setting of 10 minutes. If friendly_warnings is set to no, then
# this does nothing.

#stale_key_timeout = 600

# For most people, the default setting for "allmulti" will work just fine. In
# some cases, wireless cards have been known to not work when ALLMULTI is
# enabled. (Such as certain Orinoco cards, with older drivers.) If "allmulti"
# is set to "no", XSupplicant will not attempt to change the state of the
# setting in the driver. So, you should make sure to do an "ifconfig ethX
# -allmulti".

#allmulti = no

### NETWORK SECTION
# The general format of the network section is a network name followed
# by a group of variables.

# Network names may contain the following characters: a-z, A-Z, 0-9, '-',
# '_', '\', '/'
# Those interested in having an SSID with ANY character in it can use
# the ssid tag within the network clause. Otherwise, your ssid will
# be the name of the network.

## Default Network Section
# This is the network configuration that will be used in the event that
# no valid network configuration can be found. If you are going to leave
# Xsupplicant running all the time, it is recommended that you leave this
# section blank. A blank network definition will result in Xsupplicant
# turning off encryption and turning control over to iwconfig.
default
{type=wired
allow_types = eap-md5
identity = "YOUR_ID" # Replace your account name.
eap-md5 {
username = "YOUR_ID" # Replace your account name again
password = "YOUR_PASSWORD" # If the password has spaces, quote it.
}
}

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sudo gedit /etc/default/xsupplicant

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ENABLE = 1

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sudo xsupplicant -i eth0