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우분투 기본 설정
테스트 환경
$ cat /etc/os-release
NAME="Ubuntu"
VERSION="20.04 LTS (Focal Fossa)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 20.04 LTS"
VERSION_ID="20.04"
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
VERSION_CODENAME=focal
UBUNTU_CODENAME=focal
$ getconf LONG_BIT
64
1. 기본 에디터 변경
- 우분투 기본 편집기 : nano
기본 에디터 변경
update-alternatives --config editor
$ sudo update-alternatives --config editor
There are 4 choices for the alternative editor (providing /usr/bin/editor).
Selection Path Priority Status
------------------------------------------------------------
* 0 /bin/nano 40 auto mode
1 /bin/ed -100 manual mode
2 /bin/nano 40 manual mode
3 /usr/bin/vim.basic 30 manual mode
4 /usr/bin/vim.tiny 15 manual mode
Press <enter> to keep the current choice[*], or type selection number: 3
update-alternatives: using /usr/bin/vim.basic to provide /usr/bin/editor (editor) in manual mode
2. CLI 환경에서 네트워크 설정(고정 IP 설정)
ip addr 명령으로 인터페이스 이름 확인
ip addr
$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
...
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
...
00-installer-config.yaml 편집
vim /etc/netplan/00-installer-config.yaml
$ vim /etc/netplan/00-installer-config.yaml
# This is the network config written by 'subiquity'
network:
ethernets:
ens33:
addresses:
- 192.168.100.10/24
gateway4: 192.168.100.1
nameservers:
addresses:
- 8.8.8.8
version: 2
적용(네트워크 재기동)
netplan apply
$ netplan apply
3. sudo 패스워드 없이 사용하기
/etc/sudoers 파일 편집
user1 ALL=(ALL:ALL) ALL
user2 ALL=NOPASSWD: ALL
visudo
$ visudo
#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults env_reset
Defaults mail_badpass
Defaults secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
# Host alias specification
# User alias specification
# Cmnd alias specification
# User privilege specification
root ALL=(ALL:ALL) ALL
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL
# Allow members of group sudo to execute any command
%sudo ALL=(ALL:ALL) ALL
user1 ALL=(ALL:ALL) ALL
user2 ALL=NOPASSWD: ALL
# See sudoers(5) for more information on "#include" directives:
#includedir /etc/sudoers.d
echo 명령으로 파일 편집
echo 'user2 ALL=NOPASSWD: ALL' >> /etc/sudoers
$ echo 'user2 ALL=NOPASSWD: ALL' >> /etc/sudoers
echo 'user1 ALL=(ALL:ALL) ALL' >> /etc/sudoers
$ sudo su -
[sudo] password for user1:
root@linux:~#
echo 'user2 ALL=NOPASSWD: ALL' >> /etc/sudoers
$ sudo su -
root@linux:~#
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