- Root password 설정
- SSH 설정
- Hostname 변경
- 고정 IP 설정
- apt-get openjdk 설치
- openjdk 버전 변경
- sudo 설정
- sh \r\n -> \n
- 기본 vim
$ sudo passwd
ssh 체크
$ service ssh status
ssh 설치
$ sudo apt-get install openssh-server
ssh 시작
$ service ssh restart
ssh 확인
app@ubuntu:~$ dpkg --get-selections | grep ssh
openssh-client install
openssh-server install
openssh-sftp-server install
ssh-import-id install
app@ubuntu:~$ systemctl status ssh
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
Active: active (running) since Mon 2019-01-21 16:29:15 PST; 2min 32s ago
Main PID: 4265 (sshd)
CGroup: /system.slice/ssh.service
└─4265 /usr/sbin/sshd -D
Jan 21 16:29:15 ubuntu systemd[1]: Starting OpenBSD Secure Shell server...
Jan 21 16:29:15 ubuntu sshd[4265]: Server listening on 0.0.0.0 port 22.
Jan 21 16:29:15 ubuntu sshd[4265]: Server listening on :: port 22.
Jan 21 16:29:15 ubuntu systemd[1]: Started OpenBSD Secure Shell server.
Jan 21 16:30:37 ubuntu sshd[4378]: Accepted password for app from 192.168.5.1 port 10572 ssh2
Jan 21 16:30:37 ubuntu sshd[4378]: pam_unix(sshd:session): session opened for user app by (uid=0)
app@ubuntu:~$ ps -ef | grep sshd | grep -v grep
root 4265 1 0 16:29 ? 00:00:00 /usr/sbin/sshd -D
root 4378 4265 0 16:30 ? 00:00:00 sshd: app [priv]
app 4396 4378 0 16:30 ? 00:00:00 sshd: app@pts/0
root 초기 비밀번호 설정
app@ubuntu:~$ sudo passwd
[sudo] password for app:
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully
key 생성
# ssh-keygen -t rsa
key file check
app@ubuntu:~/.ssh$ tree ./
./
├── id_rsa
└── id_rsa.pub
authorized_keys 파일 생성
$ tail id_rsa.pub >> authorized_keys
vi /etc/ssh/sshd_config
# Authentication:
LoginGraceTime 120
#PermitRootLogin prohibit-password
PermitRootLogin without-password
StrictModes yes
확인
$ hostname
변경
$ hostnamectl set-hostname newhostname
vi /etc/network/interfaces
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
source /etc/network/interfaces.d/*
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto ens33
#iface ens33 inet dhcp
iface ens33 inet static
address 192.168.5.78
netmask 255.255.255.0
broadcast 192.168.5.255
gateway 192.168.5.2
dns-nameservers 168.126.63.1 168.126.63.2
네트워크 재시작(안되면 리붓)
$ systemctl restart networking.service
(https://www.lesstif.com/pages/viewpage.action?pageId=61899302)
시스템 interface 확인
root@app:~# ls /sys/class/net
ens33 lo
설정 파일 수정
root@app:~# vi /etc/netplan/50-cloud-init.yaml
network:
ethernets:
ens33:
addresses: [192.168.79.130/24]
dhcp4: no
gateway4: 192.168.79.2
nameservers:
addresses: [168.126.63.1,8.8.8.8]
version: 2
설정 적용
# netplay apply
# ifconfig
# nslookup google.com
apt-get 으로 openjdk-8 설치
root@app:~# apt-get install openjdk-8-jdk
root@app:~# apt-get install openjdk-8-jre
확인
root@app:~# java -version
openjdk version "1.8.0_191"
OpenJDK Runtime Environment (build 1.8.0_191-8u191-b12-2ubuntu0.18.10.1-b12)
OpenJDK 64-Bit Server VM (build 25.191-b12, mixed mode)
root@app:~# javac -version
javac 1.8.0_191
java 버전 변경
sudo update-alternatives --config java
대체 항목 java에 대해 (/usr/bin/java 제공) 3개 선택이 있습니다.
선택 경로 우선순� 상태
------------------------------------------------------------
0 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 자동 모드
* 1 /usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/java 1 수동 모드
2 /usr/lib/jvm/java-11-openjdk-amd64/bin/java 1111 수동 모드
3 /usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java 1081 수동 모드
Press <enter> to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/java-11-openjdk-amd64/bin/java to provide /usr/bin/java (java) in manual mode
$ java -version
openjdk version "11.0.4" 2019-07-16
OpenJDK Runtime Environment (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3)
OpenJDK 64-Bit Server VM (build 11.0.4+11-post-Ubuntu-1ubuntu218.04.3, mixed mode, sharing)
javac 버전 변경
$ javac -version
javac 1.8.0_222
$ sudo update-alternatives --config javac
대체 항목 javac에 대해 (/usr/bin/javac 제공) 3개 선택이 있습니다.
선택 경로 우선순� 상태
------------------------------------------------------------
0 /usr/lib/jvm/java-11-openjdk-amd64/bin/javac 1111 자동 모드
* 1 /usr/lib/jvm/java-1.8.0-openjdk-amd64/bin/javac 1 수동 모드
2 /usr/lib/jvm/java-11-openjdk-amd64/bin/javac 1111 수동 모드
3 /usr/lib/jvm/java-8-openjdk-amd64/bin/javac 1081 수동 모드
Press <enter> to keep the current choice[*], or type selection number: 0
$ javac -version
javac 11.0.4
sudoer 편집
root@app:~# vi /etc/sudoers
# User privilege specification
root ALL=(ALL:ALL) ALL
#app ALL=(ALL:ALL) ALL
app ALL=(ALL) NOPASSWD: ALL
sed $'s/\r$//' ./install.sh > ./install.Unix.sh
./install.Unix.sh --clang-completer
zaccoding@zaccoding:~$ export VISUAL=vim
zaccoding@zaccoding:~$ export EDITOR="$VISUAL"