jerry@ubuntu:/usr/lib/jvm/java$ sudo groupadd hadoop
[sudo] password for jerry:
jerry@ubuntu:/usr/lib/jvm/java$ useradd hadoop -g hadoop
useradd: Permission denied.
useradd: cannot lock /etc/passwd; try again later.
jerry@ubuntu:/usr/lib/jvm/java$ sudo useradd hadoop -g hadoop
jerry@ubuntu:/usr/lib/jvm/java$
3. 修改/etc/hosts文件，配置master, slave1, slave2的主机IP地址和主机名的映射关系。修改/etc/hostname文件，配置本机的电脑名。
jerry@ubuntu:~$ cat /etc/hosts
127.0.0.1 localhost
127.0.1.1 master
# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
master 192.168.2.110
slave1 192.168.2.111
slave2 192.168.2.112
jerry@ubuntu:~$ cat /etc/hostname
master
jerry@ubuntu:~$
4. 安装SSH
jerry@ubuntu:/usr/lib/jvm/java$ sudo apt-get install ssh
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
libck-connector0 ncurses-term openssh-client openssh-server
openssh-sftp-server ssh-import-id
Suggested packages:
libpam-ssh keychain monkeysphere rssh molly-guard
The following NEW packages will be installed:
libck-connector0 ncurses-term openssh-server openssh-sftp-server ssh
ssh-import-id
The following packages will be upgraded:
openssh-client
1 upgraded, 6 newly installed, 0 to remove and 239 not upgraded.
Need to get 617 kB/1,181 kB of archives.
After this operation, 3,450 kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 trusty/main libck-connector0 amd64 0.4.5-3.1ubuntu2 [10.5 kB]
Get:2 trusty/main ncurses-term all 5.9+20140118-1ubuntu1 [243 kB]
Get:3 trusty-updates/main openssh-sftp-server amd64 1:6.6p1-2ubuntu2.3 [34.1 kB]
Get:4 trusty-updates/main openssh-server amd64 1:6.6p1-2ubuntu2.3 [319 kB]
Get:5 trusty-updates/main ssh all 1:6.6p1-2ubuntu2.3 [1,114 B]
Get:6 trusty/main ssh-import-id all 3.21-0ubuntu1 [9,624 B]
Fetched 617 kB in 16s (37.3 kB/s)
Preconfiguring packages ...
Selecting previously unselected package libck-connector0:amd64.
(Reading database ... 166519 files and directories currently installed.)
Preparing to unpack .../libck-connector0_0.4.5-3.1ubuntu2_amd64.deb ...
Unpacking libck-connector0:amd64 (0.4.5-3.1ubuntu2) ...
Preparing to unpack .../openssh-client_1%3a6.6p1-2ubuntu2.3_amd64.deb ...
Unpacking openssh-client (1:6.6p1-2ubuntu2.3) over (1:6.6p1-2ubuntu2) ...
Selecting previously unselected package ncurses-term.
Preparing to unpack .../ncurses-term_5.9+20140118-1ubuntu1_all.deb ...
Unpacking ncurses-term (5.9+20140118-1ubuntu1) ...
Selecting previously unselected package openssh-sftp-server.
Preparing to unpack .../openssh-sftp-server_1%3a6.6p1-2ubuntu2.3_amd64.deb ...
Unpacking openssh-sftp-server (1:6.6p1-2ubuntu2.3) ...
Selecting previously unselected package openssh-server.
Preparing to unpack .../openssh-server_1%3a6.6p1-2ubuntu2.3_amd64.deb ...
Unpacking openssh-server (1:6.6p1-2ubuntu2.3) ...
Selecting previously unselected package ssh.
Preparing to unpack .../ssh_1%3a6.6p1-2ubuntu2.3_all.deb ...
Unpacking ssh (1:6.6p1-2ubuntu2.3) ...
Selecting previously unselected package ssh-import-id.
Preparing to unpack .../ssh-import-id_3.21-0ubuntu1_all.deb ...
Unpacking ssh-import-id (3.21-0ubuntu1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
ureadahead will be reprofiled on next reboot
Processing triggers for ufw (0.34~rc-0ubuntu2) ...
Setting up libck-connector0:amd64 (0.4.5-3.1ubuntu2) ...
Setting up openssh-client (1:6.6p1-2ubuntu2.3) ...
Setting up ncurses-term (5.9+20140118-1ubuntu1) ...
Setting up openssh-sftp-server (1:6.6p1-2ubuntu2.3) ...
Setting up openssh-server (1:6.6p1-2ubuntu2.3) ...
Creating SSH2 RSA key; this may take some time ...
Creating SSH2 DSA key; this may take some time ...
Creating SSH2 ECDSA key; this may take some time ...
Creating SSH2 ED25519 key; this may take some time ...
ssh start/running, process 7611
Setting up ssh-import-id (3.21-0ubuntu1) ...
Processing triggers for ureadahead (0.100.0-16) ...
Processing triggers for ufw (0.34~rc-0ubuntu2) ...
Setting up ssh (1:6.6p1-2ubuntu2.3) ...
Processing triggers for libc-bin (2.19-0ubuntu6.6) ...
5. 解压hadoop压缩包到本地，修改配置文件