To install Skype on Ubuntu 18.04 (this work with other Ubuntu/Debian versions), run
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curl https://repo.skype.com/data/SKYPE-GPG-KEY | sudo apt-key add - echo "deb [arch=amd64] https://repo.skype.com/deb stable main" | sudo tee /etc/apt/sources.list.d/skype-stable.list sudo apt-get update sudo apt-get install apt-transport-https -y sudo apt-get install skypeforlinux -y |
AnyDesk is a remote desktop sharing application like TeamViewer and Google Remote Desktop. I normally use Google Chrome Remote desk as it is completely free. TeamViewer is popuplar alternative, but if they found out you are using it more often, they will limit your session to 5 minutes, some times even less to force you pay for paid version.
AnyDesk available for Ubuntu in deb file. I don’t like installing .deb package as it run a background process on port 7070 or somthing like that. So i decided to go with flatpak version.
First install flatpak with command
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sudo apt install flatpak |
Add remote
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flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo |
Now you can install AnyDesk with command
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flatpak install flathub com.anydesk.Anydesk |
To run AnyDesk, run
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flatpak run com.anydesk.Anydesk |
Install requirements
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echo "postfix postfix/main_mailer_type string 'Internet Site'" | debconf-set-selections echo "postfix postfix/mailname string localhost" | debconf-set-selections curl -Ls https://packages.gitlab.com/gpg.key | apt-key add - apt-get update apt-get --force-yes -y upgrade apt-get clean |
Setup repo/dependency
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wget https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh bash script.deb.sh |
Install gitlab
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apt-get install -y gitlab-ce |
speedtest.net is a popular web site for testing braodband speed.
To install speedtest cli on Ubuntu, run
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apt install -y speedtest-cli |
This will be very helpful for testing speed of servers and remote systems using SSH.
To test speed, run
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speedtest |
Example
Default /etc/network/interfaces in Ubuntu 18.04 in OVH VPS look like following
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root@vps624512:~# cat /etc/network/interfaces # ifupdown has been replaced by netplan(5) on this system. See # /etc/netplan for current configuration. # To re-enable ifupdown on this system, you can run: # sudo apt install ifupdown root@vps624512:~# |
First install
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sudo apt install ifupdown -y |
Configure Main IP
use “ip a” command to find out interface name and IP of the VPS
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root@vps624512:~# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether fa:16:3e:f4:1e:fd brd ff:ff:ff:ff:ff:ff inet 51.77.149.182/32 scope global dynamic ens3 valid_lft 49349sec preferred_lft 49349sec inet6 fe80::f816:3eff:fef4:1efd/64 scope link valid_lft forever preferred_lft forever root@vps624512:~# |
In this case,
IP = 51.77.149.182
Interface Name = ens3
Use “route -n” command to find out gateway.
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root@vps624512:~# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 0.0.0.0 51.77.148.1 0.0.0.0 UG 100 0 0 ens3 51.77.148.1 0.0.0.0 255.255.255.255 UH 100 0 0 ens3 root@vps624512:~# |
GATEWAY = 51.77.148.1
Edit /etc/network/interfaces
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vi /etc/network/interfaces |
Add following
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auto INTERFACE_NAME iface INTERFACE_NAME inet static address SEVER_MAIN_IP netmask 255.255.255.255 broadcast SEVER_MAIN_IP dns-nameservers 8.8.8.8 1.1.1.1 post-up route add GATEWAY_IP dev INTERFACE_NAME post-up route add default gw GATEWAY_IP post-down route del default gw GATEWAY_IP post-down route del GATEWAY_IP dev INTERFACE_NAME |
In the above, replace INTERFACE_NAME, SEVER_MAIN_IP and GATEWAY_IP.
For this server, i added.
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auto ens3 iface ens3 inet static address 51.77.149.182 netmask 255.255.255.255 broadcast 51.77.149.182 post-up route add 51.77.148.1 dev ens3 post-up route add default gw 51.77.148.1 post-down route del default gw 51.77.148.1 post-down route del 51.77.148.1 dev ens3 |
Now reboot the server.
Once server is back online, you can configure failover IPS.
Configure Failover IP
Use following script to generate your config, add in end of /etc/network/inferfaces file
php script to generate ip config
Once configured, you need to reboot the servr.
Verify IP is up with fping command.
To install ffmpeg 4 on Ubuntu, you can use PPA
https://launchpad.net/~jonathonf/+archive/ubuntu/ffmpeg-4
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apt install software-properties-common -y add-apt-repository ppa:jonathonf/ffmpeg-4 -y |
Now install ffmpeg with
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apt update && apt install ffmpeg -y |
See ffmpeg
When updating apt on Ubuntu server, i get following error
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root@ip-172-31-25-25:/home/ubuntu# apt-get update Hit:1 http://ap-south-1.ec2.archive.ubuntu.com/ubuntu xenial InRelease Hit:2 http://ap-south-1.ec2.archive.ubuntu.com/ubuntu xenial-updates InRelease Hit:3 http://ap-south-1.ec2.archive.ubuntu.com/ubuntu xenial-backports InRelease Ign:4 http://nightly.odoo.com/9.0/nightly/deb ./ InRelease Get:5 http://nightly.odoo.com/9.0/nightly/deb ./ Release [1186 B] Get:6 http://nightly.odoo.com/9.0/nightly/deb ./ Release.gpg [819 B] Ign:6 http://nightly.odoo.com/9.0/nightly/deb ./ Release.gpg Get:7 http://nightly.odoo.com/9.0/nightly/deb ./ Packages [1790 B] Hit:8 http://security.ubuntu.com/ubuntu xenial-security InRelease Fetched 3795 B in 2s (1736 B/s) Reading package lists... Done W: GPG error: http://nightly.odoo.com/9.0/nightly/deb ./ Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY DEF2A2198183CBB5 W: The repository 'http://nightly.odoo.com/9.0/nightly/deb ./ Release' is not signed. N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use. N: See apt-secure(8) manpage for repository creation and user configuration details. root@ip-172-31-25-25:/home/ubuntu# |
To fix, run
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apt-key adv --keyserver keyserver.ubuntu.com --recv-keys DEF2A2198183CBB5 |
To see status of apparmor, run
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systemctl status apparmor |
AppArmor config files in
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/etc/apparmor.d/ |
You can stop start AppArmor with
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systemctl start apparmor systemctl stop apparmor systemctl restart apparmor systemctl disable apparmor |
Disable AppArmor
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/etc/init.d/apparmor stop /etc/init.d/apparmor teardown update-rc.d -f apparmor remove |
MySQL did not start on Ubuntu 18.04 server. This is fresh server, i removed all MySQL packages, removed configuration files.
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apt remove --purge mysql-client-5.7 mysql-client-core-5.7 mysql-common mysql-server-5.7 mysql-server-core-5.7 |
Reinstalled MySQL.
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apt install mysql-server-5.7 |
Still MySQL fail to start with some error related to
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2018-10-29T21:07:49.311174Z 0 [ERROR] Could not open file '/var/log/mysql/error.log' for error logging: Permission denied |
Full error here
https://gist.github.com/serverok/f82d8c891a58db3351c331005498f435
Initially i was thinking the problem is with Ubuntu 18.04 mysql package. So i set up another fresh Ubuntu 18.04 server, installed MySQL 5.7 and it worked prefectly fine.
Now i checked the permission for the folders. For this i enabled shell access for MySQL user.
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chsh --shell /bin/bash mysql |
Now i change to this user with command
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su - mysql |
I chaged to /var/log/mysql folder, it worked fine, i can write to the file /var/log/mysql/error.log. Tested with
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echo "hello" >> /var/log/mysql/error.log tail /var/log/mysql/error.log |
It is not a permission problem. I checked the /var/log foler, found this is not an actual folder, a symlink to another folder.
This is caused by AppArmor. I disabled AppArmour with
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systemctl stop apparmor |
Start MySQL with
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systemctl start mysql |
I get some error related to data directory, i checked folder /var/lib/mysql and found it was empty. I created MySQL data folder with command
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mysqld --initialize --explicit_defaults_for_timestamp |
On restarting MySQL again, MySQL worked fine. But i can’t login as user root. When you initialize MySQL data folder, MYSQL generate and store temporary password in /var/log/mysql/error.log, to find the password, i run
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grep -i "pass" /var/log/mysql/error.log |
You need to change this temporary password as it is set as expired by default. This can be done with command
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mysql_secure_installation |
Set a new secure password when it ask.
Fixing AppArmor
We need to tell AppArmour to allow MySQL to use /mnt/log/mysql folder for logging. To do this, edit file.
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vi /etc/apparmor.d/local/usr.sbin.mysqld |
Added following to it.
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/mnt/log/mysql/** rw, |
Now restart AppArmor.
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systemctl restart apparmor |
Now MySQL will work properly.
Download ioncube loader
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cd /usr/local/src wget https://downloads.ioncube.com/loader_downloads/ioncube_loaders_lin_x86-64.tar.gz tar xvf ioncube_loaders_lin_x86-64.tar.gz cd ioncube/ |
Find extension diretcory and copy .so file to php extension diretcory. To find php extension directory run
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php -i | grep extension_dir |
For PHP 7.2, run
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cp /usr/local/src/ioncube/ioncube_loader_lin_7.2.so /usr/lib/php/20170718 |
Enable ioncube
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echo "zend_extension=ioncube_loader_lin_7.2.so" > /etc/php/7.2/mods-available/ioncube.ini ln -s /etc/php/7.2/mods-available/ioncube.ini /etc/php/7.2/cli/conf.d/01-ioncube.ini |
for Apache, run
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ln -s /etc/php/7.2/mods-available/ioncube.ini /etc/php/7.2/apache2/conf.d/01-ioncube.ini systemctl restart apache2 |
for php-fpm, run
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ln -s /etc/php/7.2/mods-available/ioncube.ini /etc/php/7.2/fpm/conf.d/01-ioncube.ini systemctl restart php7.2-fpm |
