部署桌面雲, 需遠程管理CENTOSvim
1.啓動SSH安全
service sshd start
設置(www.111cn.net)開機運行服務器
chkconfig sshd on網絡
2.修改SSH的配置文件。以下:ssh
[root@sample ~]# vi(www.111cn.net) /etc/ssh/sshd_config ← 用vi打開SSH的配置文件tcp
首先修改SSH的配置文件。以下:ide
[root@sample ~]# vi /etc/ssh/sshd_config ← 用vi打開SSH的配置文件
ui
#Protocol 2,1 ← 找到此行將行頭「#」刪除,再將行末的「,1」刪除,只容許SSH2方式的鏈接
Protocol 2 ← 修改後變爲此狀態,僅使用SSH2spa
#ServerKeyBits 768 ← 找到這一行,將行首的「#」去掉,並將768改成1024
ServerKeyBits 1024 ← 修改後變爲此狀態,將ServerKey強度改成1024比特.net
#PermitRootLogin yes ← 找到這一行,將行首的「#」去掉,並將yes改成no
PermitRootLogin no ← 修改後變爲此狀態,不容許用root進行登陸
#PasswordAuthentication yes ← 找到這一行,將yes改成no
PasswordAuthentication no ← 修改後變爲此狀態,不容許密碼方式的登陸
#PermitEmptyPasswords no ← 找到此行將行頭的「#」刪除,不容許空密碼登陸
PermitEmptyPasswords no ← 修改後變爲此狀態,禁止空密碼進行登陸
而後保存並退出。(vi保存退出的命令爲ZZ)
由於咱們只想讓SSH服務爲管理系統提供方便,因此在不經過外網遠程管理系統的狀況下,只容許內網客戶端經過SSH登陸到服務器,以最大限度減小不安全因素。設置方法以下:
[root@sample ~]# vi /etc/hosts.deny ← 修改屏蔽規則,在文尾添加相應行
#
# hosts.deny This file describes the names of the hosts which are
# *not* allowed to use the local INET services, as decided
# by the ‘/usr/sbin/tcpd’ server.
#
# The portmap line is redundant, but it is left to remind you that
# the new secure portmap uses hosts.deny and hosts.allow. In particular
# you should know that NFS uses portmap!
sshd: ALL ← 添加這一行,屏蔽來自全部的SSH鏈接請求
(www.111cn.net)
[root@sample ~]# vi /etc/hosts.allow ← 修改容許規則,在文尾添加相應行
#
# hosts.allow This file describes the names of the hosts which are
# allowed to use the local INET services, as decided
# by the ‘/usr/sbin/tcpd’ server.
#
sshd: 192.168.0. ← 添加這一行,只容許來自內網的SSH鏈接請求
netstat -tunlp 查看正在運行的端口號!vim /etc/ssh/sshd_config這個文件,這裏把#Port 22這個字段前面的#去掉,再把22改爲本身要設的端口就好了,而後重啓ssh服務。/etc/init.d/sshd restart 假如要限制SSH登錄的IP,那麼能夠以下作:修改/etc/hosts.deny,在其中加入sshd:ALL修改:/etc/hosts.allow,在其中進行以下設置:sshd:192.168.0.24這樣就能夠限制只有192.168.0.241的IP經過SSH登錄上LINUX機器了
SSH遠程鏈接配置
3.配置IP
#setup
選擇 NetWork configuration
選擇 Device configuration
選擇 eth0
Use DHCP [*] 改 爲 [ ] 用空格鍵將*去除
Static IP 輸入 192.168.1.112
Netmask 輸入 255.255.255.0
Default gateway IP 輸入 192.168.1.1
Primary DNS Server 輸入 192.168.1.1
4.改SSH端口
vim /etc/ssh/sshd_config
#Port 22
去#註釋 改 22 爲 2200(2000以上)
5.重啓SSH
/etc/init.d/sshd restart
6.重啓網絡
service network restart
或
/etc/init.d/network restart
7.查看端口
netstat -lnp|more
8.關防火牆
/etc/init.d/iptables stop
啓動SSH
/etc/init.d/sshd start
編輯命令:
VI Editor CommandsVi has two modes insertion mode and command mode.The editor begins in command mode, where cursor movement and copy/paste editing occur.Most commands execute as soon as typed except for "colon" commands which execute when you press the return key.Switch to Text or Insert mode: Open line above cursor O Insert text at beginning of line I Insert text at cursor i Insert text after cursor a Append text at line end A Open line below cursor o Switch to Command mode:Switch to command mode <ESC>Cursor Movement (command mode): Scroll Backward 1 screen <ctrl>b Scroll Up 1/2 screen <ctrl>u Go to beginning of line 0 Go to line n nG Go to end of line $ Scroll Down 1/2 screen <ctrl>d Go to line number ## :## Scroll Forward 1 screen <ctrl>f Go to last line G Scroll by sentence f/b ( ) Scroll by word f/b w b Move left, down, up, right h j k l Left 6 chars 6hScroll by paragraph f/b { } Directional Movement Arrow Keys Go to line #6 6GDeleting text (command mode):Change word cw Replace one character r Delete word dw Delete text at cursor x Delete entire line (to buffer) dd Delete (backspace) text at cursor X Delete 5 lines (to buffer) 5dd Delete current to end of line D Delete lines 5-10 :5,10dEditing (command mode):Copy line yy Copy n lines nyy Copy lines 1-2/paste after 3 :1,2t 3Paste above current line P Paste below current line p Move lines 4-5/paste after 6 :4,5m 6 Join previous line JSearch backward for string ?string Search forward for string /string Find next string occurrence n% (entire file) s (search and replace) /old text with new/ c (confirm) g (global - all) :%s/oldstring/newstring/cg Ignore case during search :set icRepeat last command . Undo previous command u Undo all changes to line USave and Quit (command mode):Save changes to buffer :w Save changes and quit vi :wq Save file to new file :w file Quit without saving :q! Save lines to new file :10,15w file