ubuntu server 20.04下载以及安装，离线下载deb包以及依赖,修改ssh端口号

1.访问地址​​https://ubuntu.com/download/server​​

2.选中【option 2】

选择【download now】

4.

重点来了，默认情况下,ubuntu server 是不装ssh server的，只有一个ssh client ,所以按空格选中它，安装

openssh server

这个啥都不选，直接选中done

安装结束。

==========================================================================

下载离线安装的deb包

1.首先把缓存文件夹里的deb包清理掉

test@test:~$ sudo apt-get clean
[sudo] password for test:

2.例如下载g++以及它的所有依赖包

test@test:~$ sudo apt-get install -d g++
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
binutils binutils-common binutils-x86-64-linux-gnu cpp cpp-9 g++-9 gcc gcc-9
gcc-9-base libasan5 libatomic1 libbinutils libc-dev-bin libc6-dev libcc1-0
libcrypt-dev libctf-nobfd0 libctf0 libgcc-9-dev libgomp1 libisl22 libitm1
liblsan0 libmpc3 libquadmath0 libstdc++-9-dev libtsan0 libubsan1
linux-libc-dev manpages-dev
Suggested packages:
binutils-doc cpp-doc gcc-9-locales g++-multilib g++-9-multilib gcc-9-doc
gcc-multilib make autoconf automake libtool flex bison gdb gcc-doc
gcc-9-multilib glibc-doc libstdc++-9-doc
The following NEW packages will be installed:
binutils binutils-common binutils-x86-64-linux-gnu cpp cpp-9 g++ g++-9 gcc
gcc-9 gcc-9-base libasan5 libatomic1 libbinutils libc-dev-bin libc6-dev
libcc1-0 libcrypt-dev libctf-nobfd0 libctf0 libgcc-9-dev libgomp1 libisl22
libitm1 liblsan0 libmpc3 libquadmath0 libstdc++-9-dev libtsan0 libubsan1
linux-libc-dev manpages-dev
0 upgraded, 31 newly installed, 0 to remove and 10 not upgraded.
Need to get 44.1 MB of archives.
After this operation, 197 MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Get:1 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 binutils-comm on amd64 2.34-6ubuntu1.3 [207 kB]
Get:2 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libbinutils a md64 2.34-6ubuntu1.3 [474 kB]
Get:3 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libctf-nobfd0 amd64 2.34-6ubuntu1.3 [47.4 kB]
Get:4 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libctf0 amd64 2.34-6ubuntu1.3 [46.6 kB]
Get:5 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 binutils-x86- 64-linux-gnu amd64 2.34-6ubuntu1.3 [1,613 kB]
Get:6 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 binutils amd6 4 2.34-6ubuntu1.3 [3,380 B]
Get:7 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 gcc-9-base am d64 9.4.0-1ubuntu1~20.04 [19.4 kB]
Get:8 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 libisl22 amd64 0.22.1 -1 [592 kB]
Get:9 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 libmpc3 amd64 1.1.0-1 [40.8 kB]
Get:10 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 cpp-9 amd64 9.4.0-1ubuntu1~20.04 [7,501 kB]
Get:11 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 cpp amd64 4:9.3.0-1u buntu2 [27.6 kB]
Get:12 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libcc1-0 amd 64 10.3.0-1ubuntu1~20.04 [48.8 kB]
Get:13 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libgomp1 amd 64 10.3.0-1ubuntu1~20.04 [102 kB]
Get:14 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libitm1 amd6 4 10.3.0-1ubuntu1~20.04 [26.2 kB]
Get:15 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libatomic1 a md64 10.3.0-1ubuntu1~20.04 [9,284 B]
Get:16 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libasan5 amd 64 9.4.0-1ubuntu1~20.04 [2,752 kB]
Get:17 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 liblsan0 amd 64 10.3.0-1ubuntu1~20.04 [835 kB]
Get:18 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libtsan0 amd 64 10.3.0-1ubuntu1~20.04 [2,009 kB]
Get:19 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libubsan1 am d64 10.3.0-1ubuntu1~20.04 [784 kB]
Get:20 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libquadmath0 amd64 10.3.0-1ubuntu1~20.04 [146 kB]
Get:21 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libgcc-9-dev amd64 9.4.0-1ubuntu1~20.04 [2,360 kB]
Get:22 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 gcc-9 amd64 9.4.0-1ubuntu1~20.04 [8,275 kB]
Get:23 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 gcc amd64 4:9.3.0-1u buntu2 [5,208 B]
Get:24 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libc-dev-bin amd64 2.31-0ubuntu9.7 [71.6 kB]
Get:25 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 linux-libc-d ev amd64 5.4.0-104.118 [1,117 kB]
Get:26 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 libcrypt-dev amd64 1 :4.4.10-10ubuntu4 [104 kB]
Get:27 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libc6-dev am d64 2.31-0ubuntu9.7 [2,518 kB]
Get:28 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 libstdc++-9- dev amd64 9.4.0-1ubuntu1~20.04 [1,722 kB]
Get:29 http://cn.archive.ubuntu.com/ubuntu focal-updates/main amd64 g++-9 amd64 9.4.0-1ubuntu1~20.04 [8,421 kB]
Get:30 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 g++ amd64 4:9.3.0-1u buntu2 [1,604 B]
Get:31 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 manpages-dev all 5.0 5-1 [2,266 kB]
Fetched 44.1 MB in 7s (6,295 kB/s)




Download complete and in download only mode

进入缓存文件夹  /var/cache/apt/archives 查看：

test@test:~$ cd /var/cache/apt/archives
test@test:/var/cache/apt/archives$ ll
total 43176
drwxr-xr-x 3 root root 4096 Mar 16 11:51 ./
drwxr-xr-x 3 root root 4096 Mar 16 11:50 ../
-rw-r--r-- 1 root root 3380 Oct 25 16:15 binutils_2.34-6ubuntu1.3_amd64.deb
-rw-r--r-- 1 root root 207032 Oct 25 16:15 binutils-common_2.34-6ubuntu1.3_amd64.deb
-rw-r--r-- 1 root root 1613160 Oct 25 16:15 binutils-x86-64-linux-gnu_2.34-6ubuntu1.3_amd64.deb
-rw-r--r-- 1 root root 27588 Mar 24 2020 cpp_4%3a9.3.0-1ubuntu2_amd64.deb
-rw-r--r-- 1 root root 7500604 Nov 8 16:54 cpp-9_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 1604 Mar 24 2020 g++_4%3a9.3.0-1ubuntu2_amd64.deb
-rw-r--r-- 1 root root 8420748 Nov 8 16:54 g++-9_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 5208 Mar 24 2020 gcc_4%3a9.3.0-1ubuntu2_amd64.deb
-rw-r--r-- 1 root root 8274520 Nov 8 16:55 gcc-9_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 19364 Nov 8 16:54 gcc-9-base_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 2752088 Nov 8 16:54 libasan5_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 9284 Jun 14 2021 libatomic1_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 473972 Oct 25 16:15 libbinutils_2.34-6ubuntu1.3_amd64.deb
-rw-r--r-- 1 root root 2517900 Mar 1 15:24 libc6-dev_2.31-0ubuntu9.7_amd64.deb
-rw-r--r-- 1 root root 48788 Jun 14 2021 libcc1-0_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 71636 Mar 1 15:24 libc-dev-bin_2.31-0ubuntu9.7_amd64.deb
-rw-r--r-- 1 root root 104104 Mar 10 2020 libcrypt-dev_1%3a4.4.10-10ubuntu4_amd64.deb
-rw-r--r-- 1 root root 46636 Oct 25 16:15 libctf0_2.34-6ubuntu1.3_amd64.deb
-rw-r--r-- 1 root root 47420 Oct 25 16:15 libctf-nobfd0_2.34-6ubuntu1.3_amd64.deb
-rw-r--r-- 1 root root 2359512 Nov 8 16:54 libgcc-9-dev_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 101584 Jun 14 2021 libgomp1_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 591960 Feb 18 2020 libisl22_0.22.1-1_amd64.deb
-rw-r--r-- 1 root root 26196 Jun 14 2021 libitm1_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 834692 Jun 14 2021 liblsan0_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 40784 Jan 23 2018 libmpc3_1.1.0-1_amd64.deb
-rw-r--r-- 1 root root 146072 Jun 14 2021 libquadmath0_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 1722428 Nov 8 16:54 libstdc++-9-dev_9.4.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 2008872 Jun 14 2021 libtsan0_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 784116 Jun 14 2021 libubsan1_10.3.0-1ubuntu1~20.04_amd64.deb
-rw-r--r-- 1 root root 1117248 Mar 8 18:35 linux-libc-dev_5.4.0-104.118_amd64.deb
-rw-r----- 1 root root 0 Feb 23 08:57 lock
-rw-r--r-- 1 root root 2265524 Feb 10 2020 manpages-dev_5.05-1_all.deb
drwx------ 2 _apt root 4096 Mar 16 11:51 partial/

安装所有的离线deb包：

dpkg -i   *.deb

test@test:/var/cache/apt/archives$ sudo dpkg -i *.deb
Selecting previously unselected package binutils.
(Reading database ... 71718 files and directories currently installed.)
Preparing to unpack binutils_2.34-6ubuntu1.3_amd64.deb ...
Unpacking binutils (2.34-6ubuntu1.3) ...
Selecting previously unselected package binutils-common:amd64.
Preparing to unpack binutils-common_2.34-6ubuntu1.3_amd64.deb ...
Unpacking binutils-common:amd64 (2.34-6ubuntu1.3) ...
Selecting previously unselected package binutils-x86-64-linux-gnu.
Preparing to unpack binutils-x86-64-linux-gnu_2.34-6ubuntu1.3_amd64.deb ...
Unpacking binutils-x86-64-linux-gnu (2.34-6ubuntu1.3) ...
Selecting previously unselected package cpp.
Preparing to unpack cpp_4%3a9.3.0-1ubuntu2_amd64.deb ...
Unpacking cpp (4:9.3.0-1ubuntu2) ...
Selecting previously unselected package cpp-9.
Preparing to unpack cpp-9_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking cpp-9 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package g++.
Preparing to unpack g++_4%3a9.3.0-1ubuntu2_amd64.deb ...
Unpacking g++ (4:9.3.0-1ubuntu2) ...
Selecting previously unselected package g++-9.
Preparing to unpack g++-9_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking g++-9 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package gcc.
Preparing to unpack gcc_4%3a9.3.0-1ubuntu2_amd64.deb ...
Unpacking gcc (4:9.3.0-1ubuntu2) ...
Selecting previously unselected package gcc-9.
Preparing to unpack gcc-9_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking gcc-9 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package gcc-9-base:amd64.
Preparing to unpack gcc-9-base_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking gcc-9-base:amd64 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package libasan5:amd64.
Preparing to unpack libasan5_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libasan5:amd64 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package libatomic1:amd64.
Preparing to unpack libatomic1_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libatomic1:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package libbinutils:amd64.
Preparing to unpack libbinutils_2.34-6ubuntu1.3_amd64.deb ...
Unpacking libbinutils:amd64 (2.34-6ubuntu1.3) ...
Selecting previously unselected package libc6-dev:amd64.
Preparing to unpack libc6-dev_2.31-0ubuntu9.7_amd64.deb ...
Unpacking libc6-dev:amd64 (2.31-0ubuntu9.7) ...
Selecting previously unselected package libcc1-0:amd64.
Preparing to unpack libcc1-0_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libcc1-0:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package libc-dev-bin.
Preparing to unpack libc-dev-bin_2.31-0ubuntu9.7_amd64.deb ...
Unpacking libc-dev-bin (2.31-0ubuntu9.7) ...
Selecting previously unselected package libcrypt-dev:amd64.
Preparing to unpack libcrypt-dev_1%3a4.4.10-10ubuntu4_amd64.deb ...
Unpacking libcrypt-dev:amd64 (1:4.4.10-10ubuntu4) ...
Selecting previously unselected package libctf0:amd64.
Preparing to unpack libctf0_2.34-6ubuntu1.3_amd64.deb ...
Unpacking libctf0:amd64 (2.34-6ubuntu1.3) ...
Selecting previously unselected package libctf-nobfd0:amd64.
Preparing to unpack libctf-nobfd0_2.34-6ubuntu1.3_amd64.deb ...
Unpacking libctf-nobfd0:amd64 (2.34-6ubuntu1.3) ...
Selecting previously unselected package libgcc-9-dev:amd64.
Preparing to unpack libgcc-9-dev_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libgcc-9-dev:amd64 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package libgomp1:amd64.
Preparing to unpack libgomp1_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libgomp1:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package libisl22:amd64.
Preparing to unpack libisl22_0.22.1-1_amd64.deb ...
Unpacking libisl22:amd64 (0.22.1-1) ...
Selecting previously unselected package libitm1:amd64.
Preparing to unpack libitm1_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libitm1:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package liblsan0:amd64.
Preparing to unpack liblsan0_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking liblsan0:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package libmpc3:amd64.
Preparing to unpack libmpc3_1.1.0-1_amd64.deb ...
Unpacking libmpc3:amd64 (1.1.0-1) ...
Selecting previously unselected package libquadmath0:amd64.
Preparing to unpack libquadmath0_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libquadmath0:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package libstdc++-9-dev:amd64.
Preparing to unpack libstdc++-9-dev_9.4.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libstdc++-9-dev:amd64 (9.4.0-1ubuntu1~20.04) ...
Selecting previously unselected package libtsan0:amd64.
Preparing to unpack libtsan0_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libtsan0:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package libubsan1:amd64.
Preparing to unpack libubsan1_10.3.0-1ubuntu1~20.04_amd64.deb ...
Unpacking libubsan1:amd64 (10.3.0-1ubuntu1~20.04) ...
Selecting previously unselected package linux-libc-dev:amd64.
Preparing to unpack linux-libc-dev_5.4.0-104.118_amd64.deb ...
Unpacking linux-libc-dev:amd64 (5.4.0-104.118) ...
Selecting previously unselected package manpages-dev.
Preparing to unpack manpages-dev_5.05-1_all.deb ...
Unpacking manpages-dev (5.05-1) ...
Setting up binutils-common:amd64 (2.34-6ubuntu1.3) ...
Setting up gcc-9-base:amd64 (9.4.0-1ubuntu1~20.04) ...
Setting up libasan5:amd64 (9.4.0-1ubuntu1~20.04) ...
Setting up libatomic1:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up libbinutils:amd64 (2.34-6ubuntu1.3) ...
Setting up libcc1-0:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up libc-dev-bin (2.31-0ubuntu9.7) ...
Setting up libcrypt-dev:amd64 (1:4.4.10-10ubuntu4) ...
Setting up libctf0:amd64 (2.34-6ubuntu1.3) ...
Setting up libctf-nobfd0:amd64 (2.34-6ubuntu1.3) ...
Setting up libgomp1:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up libisl22:amd64 (0.22.1-1) ...
Setting up libitm1:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up liblsan0:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up libmpc3:amd64 (1.1.0-1) ...
Setting up libquadmath0:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up libtsan0:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up libubsan1:amd64 (10.3.0-1ubuntu1~20.04) ...
Setting up linux-libc-dev:amd64 (5.4.0-104.118) ...
Setting up manpages-dev (5.05-1) ...
Setting up binutils-x86-64-linux-gnu (2.34-6ubuntu1.3) ...
Setting up cpp-9 (9.4.0-1ubuntu1~20.04) ...
Setting up libc6-dev:amd64 (2.31-0ubuntu9.7) ...
Setting up libgcc-9-dev:amd64 (9.4.0-1ubuntu1~20.04) ...
Setting up libstdc++-9-dev:amd64 (9.4.0-1ubuntu1~20.04) ...
Setting up binutils (2.34-6ubuntu1.3) ...
Setting up cpp (4:9.3.0-1ubuntu2) ...
Setting up gcc-9 (9.4.0-1ubuntu1~20.04) ...
Setting up g++-9 (9.4.0-1ubuntu1~20.04) ...
Setting up gcc (4:9.3.0-1ubuntu2) ...
Setting up g++ (4:9.3.0-1ubuntu2) ...
update-alternatives: using /usr/bin/g++ to provide /usr/bin/c++ (c++) in auto mode
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for libc-bin (2.31-0ubuntu9.7) ...
test@test:/var/cache/apt/archives$test@test:/var/cache/apt/archives$ which g++
/usr/bin/g++
test@test:/var/cache/apt/archives$

=============================================================

因为netstat 这个命令是默认不自带的，很不方便，所以我们离线下载一下它的deb包

1.首先清理deb缓存文件夹

test@test:/var/cache/apt/archives$​ sudo apt-get clean​

test@test:/var/cache/apt/archives$ cd /var/cache/apt/archives
test@test:/var/cache/apt/archives$ ll
total 12
drwxr-xr-x 3 root root 4096 Mar 16 11:58 ./
drwxr-xr-x 3 root root 4096 Mar 16 11:58 ../
-rw-r----- 1 root root 0 Feb 23 08:57 lock
drwx------ 2 _apt root 4096 Mar 16 11:51 partial/

test@test:/var/cache/apt/archives$ ​sudo apt-get install -d net-tools​

test@test:/var/cache/apt/archives$ sudo apt-get install -d net-tools
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
net-tools
0 upgraded, 1 newly installed, 0 to remove and 10 not upgraded.
Need to get 196 kB of archives.
After this operation, 864 kB of additional disk space will be used.
Get:1 http://cn.archive.ubuntu.com/ubuntu focal/main amd64 net-tools amd64 1.60+git20180626.aeb d88e-1ubuntu1 [196 kB]
Fetched 196 kB in 2s (118 kB/s)
Download complete and in download only mode
test@test:/var/cache/apt/archives$ ll
total 204
drwxr-xr-x 3 root root 4096 Mar 16 12:00 ./
drwxr-xr-x 3 root root 4096 Mar 16 11:59 ../
-rw-r----- 1 root root 0 Feb 23 08:57 lock
-rw-r--r-- 1 root root 196392 Feb 1 2019 net-tools_1.60+git20180626.aebd88e-1ubuntu1_amd64.de b
drwx------ 2 _apt root 4096 Mar 16 12:00 partial/
test@test:/var/cache/apt/archives$

2.离线安装net-tools离线deb包

test@test:/var/cache/apt/archives$ ​sudo dpkg -i *.deb​

3.检查能否使用net-tools中的 netstat 命令

test@test:/var/cache/apt/archives$ sudo netstat -tlunp | grep ssh
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1447/sshd: /usr/sbi
tcp 0 0 127.0.0.1:6010 0.0.0.0:* LISTEN 1820/sshd: test@pts
tcp6 0 0 :::22 :::* LISTEN 1447/sshd: /usr/sbi
tcp6 0 0 ::1:6010 :::* LISTEN 1820/sshd: test@pts
test@test:/var/cache/apt/archives$

安装成功！！！

=================================================================================

【修改SSH server 端口号】

ssh server 的默认的配置文件是ssd_config 

test@test:/var/cache/apt/archives$ ​sudo vi /etc/ssh/sshd_config​

1.例如将ssh端口改为2222，

2.修改配置文件，默认允许root登录，但是禁止root用密码登录。我们把它改掉，允许root 用密码登录

上图所示，ssh改为了2222端口，

重新用root登录，检查一下：

成功了！！！