Category Archives: [OS]Ubuntu

iptables

Ubuntu PHP7.3 에서 PHP7.4 으로 안전하게 업그레이드 하기

1. repository 최신데이타 받기 2.설치전 업데이트 3.php7.4 설치 4.php7.4 util 설치 5.php 새번전 등록 6.php7.3 비활성화 7.php7.4 활성화 8.apache2 restart 9.버전 확인

ubuntu vsftpd SSL/TLS로 접속 하기

Ubuntu ftp 디렉토리 / 접속계정 세팅 1.디렉토리 생성 2.계정 추가 3.계정 비번 새로 변경 4.계정 생성 확인 5.디렉토리 계정 권한으로 세팅 6.기타 설정 Ubuntu SSL 7.SSL 설치 일반 FTP 는 암호화가 되지 않은 패킷이 오가는 등의 보안 문제가 있으니vsftpd 의 SFTP + SSL/TLS 로 서비스를 구성해 봅니다. 아래 설치 없이 기존 설치되어 있는 SSL/TLS 를… Read More »

CIFS Utils

samba 설치된 컴에 mount 연결 하기 명령어로 네트워크 컴퓨터 조사

VI 기본 명령어

1. 파일 열기 닫기 파일열기 : vi info.php 파일 저장하고 닫기 (esc 버튼) : qw! 저장없이 닫기 (esc 버튼) : q! 2. 파일 편집 (esc 버튼) 입력/수정 모드 진입 : i 또는 a 단어 삭제 : dw 실행 취소 : u 한줄 삭제 : dd 복사 : yy 붙여넣기 : p 3. 위치이동 (esc 버튼) 파일 맨… Read More »

Ubuntu Updates 20

Ubuntu 20.04.1 로 업데이이트 다음 명령어 단계에서 진행 되지 않으면 업데이트 후 진행 합니다.


do-release-upgrade

do-release-upgrade


Checking for a new Ubuntu release
Please install all available updates for your release before upgrading.

Checking for a new Ubuntu release

Please install all available updates for your release before upgrading.

Ubuntu 20.04.1


sudo apt-get update

sudo apt-get update


sudo apt-get upgrade -y

sudo apt-get upgrade -y


sudo apt-get dist-upgrade

sudo apt-get dist-upgrade


sudo do-release-upgrade

sudo do-release-upgrade

Y 로 할 경우 SSH 1022 포트를 추가 하라고 나옵니다. 방화벽에 추가한 다음 진행. 완료 후 재부팅이 버전 Ubuntu 20.04.1 을 확인할 수 있다.


Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-48-generic x86_64)

 * Documentation:  https://help.ubuntu.com
 * Management:     https://landscape.canonical.com
 * Support:        https://ubuntu.com/advantage

  System information as of Tue 06 Oct 2020 01:20:49 PM KST

  System load:  0.31               Processes:             179
  Usage of /:   56.5% of 25.27GB   Users logged in:       0
  Memory usage: 64%                IPv4 address for eth0: 111.222.222.222
  Swap usage:   0%

0 updates can be installed immediately.
0 of these updates are security updates

Welcome to Ubuntu 20.04.1 LTS (GNU/Linux 5.4.0-48-generic x86_64)

* Documentation: https://help.ubuntu.com

* Management: https://landscape.canonical.com

* Support: https://ubuntu.com/advantage

System information as of Tue 06 Oct 2020 01:20:49 PM KST

System load: 0.31 Processes: 179

Usage of /: 56.5% of 25.27GB Users logged in: 0

Memory usage: 64% IPv4 address for eth0: 111.222.222.222

Swap usage: 0%

0 updates can be installed immediately.

0 of these updates are security updates

비고> Continue N 으로 할 경우 아래와… Read More »

ubuntu 18.04 mysql 8.023 설치

sudo apt update sudo apt install mysql-server sudo mysql_secure_installation


sudo apt update
sudo apt install mysql-server
sudo mysql_secure_installation

sudo apt update

sudo apt install mysql-server

sudo mysql_secure_installation


root@localhost:/etc/apache2# sudo mysql_secure_installation

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords
and improve security. It checks the strength of password
and allows the users to set only those passwords which are
secure enough. Would you like to setup VALIDATE PASSWORD plugin?

Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:

LOW    Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary                  file

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0
Please set the password for root here.

New password:

Re-enter new password:

Estimated strength of the password: 50
Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y
By default, a MySQL installation has an anonymous user,
allowing anyone to log into MySQL without having to have
a user account created for them. This is intended only for
testing, and to make the installation go a bit smoother.
You should remove them before moving into a production
environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y
Success.


Normally, root should only be allowed to connect from
'localhost'. This ensures that someone cannot guess at
the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : n

 ... skipping.
By default, MySQL comes with a database named 'test' that
anyone can access. This is also intended only for testing,
and should be removed before moving into a production
environment.


Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y
 - Dropping test database...
Success.

 - Removing privileges on test database...
Success.

Reloading the privilege tables will ensure that all changes
made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : n

 ... skipping.
All done!

root@localhost:/etc/apache2# sudo mysql_secure_installation

Securing the MySQL server deployment.

Connecting to MySQL using a blank password.

VALIDATE PASSWORD PLUGIN can be used to test passwords

and improve security. It checks the strength of password

and allows the users to set only those passwords which are

secure enough. Would you like to setup VALIDATE PASSWORD plugin?

Press y|Y for Yes, any other key for No: y

There are three levels of password validation policy:

LOW Length >= 8

MEDIUM Length >= 8, numeric, mixed case, and special characters

STRONG Length >= 8, numeric, mixed case, special characters and dictionary file

Please enter 0 = LOW, 1 = MEDIUM and 2 = STRONG: 0

Please set the password for root here.

New password:

Re-enter new password:

Estimated strength of the password: 50

Do you wish to continue with the password provided?(Press y|Y for Yes, any other key for No) : y

By default, a MySQL installation has an anonymous user,

allowing anyone to log into MySQL without having to have

a user account created for them. This is intended only for

testing, and to make the installation go a bit smoother.

You should remove them before moving into a production

environment.

Remove anonymous users? (Press y|Y for Yes, any other key for No) : y

Success.

Normally, root should only be allowed to connect from

'localhost'. This ensures that someone cannot guess at

the root password from the network.

Disallow root login remotely? (Press y|Y for Yes, any other key for No) : n

... skipping.

By default, MySQL comes with a database named 'test' that

anyone can access. This is also intended only for testing,

and should be removed before moving into a production

environment.

Remove test database and access to it? (Press y|Y for Yes, any other key for No) : y

- Dropping test database...

Success.

- Removing privileges on test database...

Success.

Reloading the privilege tables will ensure that all changes

made so far will take effect immediately.

Reload privilege tables now? (Press y|Y for Yes, any other key for No) : n

... skipping.

All done!

Check authentication method for MySQL users


root@localhost:/etc/apache2# sudo mysql -uroot -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.30-0ubuntu0.18.04.1 (Ubuntu)

Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use mysql
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> SELECT user,host,authentication_string,plugin,host FROM mysql.user;
+------------------+-----------+-------------------------------------------+-----------------------+-----------+
| user             | host      | authentication_string                     | plugin                | host      |
+------------------+-----------+-------------------------------------------+-----------------------+-----------+
| root             | localhost |                                           | auth_socket           | localhost |
| mysql.session    | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | mysql_native_password | localhost |
| mysql.sys        | localhost | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | mysql_native_password | localhost |
| debian-sys-maint | localhost | *C93D3360F51BE0E6E42E58C4D7F4853973596949 | mysql_native_password | localhost |
+------------------+-----------+-------------------------------------------+-----------------------+-----------+
4 rows in set (0.00 sec)

mysql>
mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'StrongPassword';
Query OK, 0 rows affected (0.00 sec)

mysql> SELECT user,authentication_string,plugin,host FROM mysql.user;
+------------------+-------------------------------------------+-----------------------+-----------+
| user             | authentication_string                     | plugin                | host      |
+------------------+-------------------------------------------+-----------------------+-----------+
| root             | *E57EB53ADCB799E5C107333FBBF5429597A509AC | mysql_native_password | %         |
| mysql.session    | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | mysql_native_password | localhost |
| mysql.sys        | *THISISNOTAVALIDPASSWORDTHATCANBEUSEDHERE | mysql_native_password | localhost |
| debian-sys-maint | *C93D3360F51BE0E6E42E58C4D7F4853973596949 | mysql_native_password | localhost |
+------------------+-------------------------------------------+-----------------------+-----------+
4 rows in set (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)

root@localhost:/etc/apache2# sudo mysql -uroot -p

Enter password:

Welcome to the MySQL monitor. Commands end with ; or \g.

Your MySQL connection id is 4

Server version: 5.7.30-0ubuntu0.18.04.1 (Ubuntu)

Oracle is a registered trademark of Oracle Corporation and/or its

affiliates. Other names may be trademarks of their respective

owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> use mysql

Reading table information for completion of table and column names

You can turn off this feature to get a quicker startup with -A

Database changed

mysql> SELECT user,host,authentication_string,plugin,host FROM mysql.user;

+------------------+-----------+-------------------------------------------+-----------------------+-----------+

+------------------+-----------+-------------------------------------------+-----------------------+-----------+

+------------------+-----------+-------------------------------------------+-----------------------+-----------+

4 rows in set (0.00 sec)

mysql>

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'StrongPassword';

Query OK, 0 rows affected (0.00 sec)

mysql> SELECT user,authentication_string,plugin,host FROM mysql.user;

+------------------+-------------------------------------------+-----------------------+-----------+

+------------------+-------------------------------------------+-----------------------+-----------+

+------------------+-------------------------------------------+-----------------------+-----------+

4 rows in set (0.00 sec)

mysql> FLUSH PRIVILEGES;

Query OK, 0 rows affected (0.00 sec)

#주석처리 #bind-address=127.0.0.0 vi /etc/mysql/mysql.conf.d/mysqld.cnf


#bind-address           = 127.0.0.1

#bind-address = 127.0.0.1

ufw allow 연결 설정 Or IPtable Port open


  ufw allow from myIP(111.222.333.222) to any port 3306

ufw allow from myIP(111.222.333.222) to any port 3306


  iptables -A INPUT -p tcp -s myIP(111.222.333.222) --dport 3306 -j ACCEPT

iptables -A INPUT -p tcp -s myIP(111.222.333.222) --dport 3306 -j ACCEPT

Mysql WorkBench

ubuntu 설치된 버전 확인

간단하게 현재 사용중인 우분투의 버전을 확인 lsb_release -a


root@localhost:/etc/apache2# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.1 LTS
Release:        18.04
Codename:       bionic

root@localhost:/etc/apache2# lsb_release -a

No LSB modules are available.

Distributor ID: Ubuntu

Description: Ubuntu 18.04.1 LTS

Release: 18.04

Codename: bionic

cat /etc/*release


root@localhost:/etc/apache2# cat /etc/*release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.1 LTS"
NAME="Ubuntu"
VERSION="18.04.1 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.1 LTS"
VERSION_ID="18.04"
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=bionic
UBUNTU_CODENAME=bionic

root@localhost:/etc/apache2# cat /etc/*release

DISTRIB_ID=Ubuntu

DISTRIB_RELEASE=18.04

DISTRIB_CODENAME=bionic

DISTRIB_DESCRIPTION="Ubuntu 18.04.1 LTS"

NAME="Ubuntu"

VERSION="18.04.1 LTS (Bionic Beaver)"

ID=ubuntu

ID_LIKE=debian

PRETTY_NAME="Ubuntu 18.04.1 LTS"

VERSION_ID="18.04"

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=bionic

UBUNTU_CODENAME=bionic

설치된 리눅스(우분투)가 32비트인지 64비트인지 확인 uname -m


root@locahost:/etc/apache2# uname -m
x86_64

root@locahost:/etc/apache2# uname -m

x86_64

apache internal dummy connection 로그 생성 방지하기

apache 가 정상적으로 응답하지 않는 현상도 발생


::1 - - [26/Mar/2020:16:10:30 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"
::1 - - [26/Mar/2020:16:10:31 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"
::1 - - [26/Mar/2020:16:10:32 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"
::1 - - [26/Mar/2020:16:10:33 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"
::1 - - [26/Mar/2020:16:10:35 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"

::1 - - [26/Mar/2020:16:10:30 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"

::1 - - [26/Mar/2020:16:10:31 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"

::1 - - [26/Mar/2020:16:10:32 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"

::1 - - [26/Mar/2020:16:10:33 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"

::1 - - [26/Mar/2020:16:10:35 +0900] "OPTIONS * HTTP/1.0" 200 126 "-" "Apache/2.4.29 (Ubuntu) OpenSSL/1.1.0g (internal dummy connection)"

해결책 : /etc/apache2/apache2.conf


SetEnvIf Remote_Addr "::1" loopback
SetEnvIf Remote_Addr "127\.0\.0\.1" loopback
CustomLog ${APACHE_LOG_DIR}/access_log combined env=!loopback

SetEnvIf Remote_Addr "::1" loopback

SetEnvIf Remote_Addr "127\.0\.0\.1" loopback

CustomLog ${APACHE_LOG_DIR}/access_log combined env=!loopback

참조 : https://cwiki.apache.org/confluence/display/HTTPD/InternalDummyConnection https://allthatlinux.com/dokuwiki/doku.php?id=access_log%EC%97%90_options_http_1.0_%EA%B0%80_%EA%B8%B0%EB%A1%9D%EB%90%98%EB%8A%94_%EC%9D%B4%EC%9C%A0

ubuntu Hash sum mismatch error


E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-amd64/by-hash/SHA256/86d06dec5cec67943ee6e7c12ecb473588920e74747b6126d12fbf679ccfb18a  Hash Sum mismatch

E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/xenial-updates/main/binary-amd64/by-hash/SHA256/86d06dec5cec67943ee6e7c12ecb473588920e74747b6126d12fbf679ccfb18a Hash Sum mismatch


sudo rm -rf /var/lib/apt/lists/*
sudo apt-get update

sudo rm -rf /var/lib/apt/lists/*

sudo apt-get update

참조 : https://askubuntu.com/questions/41605/trouble-downloading-packages-list-due-to-a-hash-sum-mismatch-error

Install .NET Core SDK on Linux Ubuntu 18.04

[wp-svg-icons icon=”pencil” wrap=”i”] Register Microsoft key and feed


wget -q https://packages.microsoft.com/config/ubuntu/18.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb
sudo dpkg -i packages-microsoft-prod.deb

wget -q https://packages.microsoft.com/config/ubuntu/18.04/packages-microsoft-prod.deb -O packages-microsoft-prod.deb

sudo dpkg -i packages-microsoft-prod.deb

[wp-svg-icons icon=”arrow-right” wrap=”i”]Install the .NET SDK


sudo add-apt-repository universe

sudo add-apt-repository universe


'universe' distribution component is already enabled for all sources.

'universe' distribution component is already enabled for all sources.

[wp-svg-icons icon=”pushpin” wrap=”i”]위 에러시


sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) universe"
안되면
sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse"

sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) universe"

안되면

sudo add-apt-repository "deb http://archive.ubuntu.com/ubuntu $(lsb_release -sc) main universe restricted multiverse"

계속진행


sudo apt-get update
sudo apt-get install apt-transport-https
sudo apt-get update
sudo apt-get install dotnet-sdk-3.0

sudo apt-get update

sudo apt-get install apt-transport-https

sudo apt-get update

sudo apt-get install dotnet-sdk-3.0

[wp-svg-icons icon=”tv” wrap=”i”]Hello World


cd /var/www
dotnet new console -o HelloWorld
cd HelloWorld
dotnet run
=> Hello World!

cd /var/www

dotnet new console -o HelloWorld

cd HelloWorld

dotnet run

=> Hello World!


# 제거 
# 3.0
sudo apt-get remove dotnet-sdk-3.0
#2.3
sudo apt-get remove dotnet-sdk-2.2

# 제거

# 3.0

sudo apt-get remove dotnet-sdk-3.0

#2.3

sudo apt-get remove dotnet-sdk-2.2