dnsmasq is a very powerful tool that can provide basic dns services/caching, act as dhcp server and also as tftp server. To install dnsmasq, run
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apt install dnsmasq |
When you start dnsmasq, if it complain about port 53 alreay in use
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dnsmasq: failed to create listening socket for port 53: Address already in use |
This is because some other service is running on port 53. To find what service […]
To enable firewal for Ant Media Server on Ubnuntu server, use following rules
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ufw allow ssh ufw allow http ufw allow https ufw allow 1935/tcp ufw allow 5080/tcp ufw allow 5443/tcp ufw allow 5000:65000/udp enable ufw |
After enabling, you will have following status
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root@server:~# ufw status Status: active To Action From -- ------ ---- 22/tcp ALLOW Anywhere 80/tcp ALLOW Anywhere 443/tcp ALLOW Anywhere 1935/tcp ALLOW Anywhere 5080/tcp ALLOW Anywhere 5443/tcp ALLOW Anywhere 5000:65000/udp ALLOW Anywhere 22/tcp (v6) ALLOW Anywhere (v6) 80/tcp (v6) ALLOW Anywhere (v6) 443/tcp (v6) ALLOW Anywhere (v6) 1935/tcp (v6) ALLOW Anywhere (v6) 5080/tcp (v6) ALLOW Anywhere (v6) 5443/tcp (v6) ALLOW Anywhere (v6) 5000:65000/udp (v6) ALLOW Anywhere (v6) root@server:~# |
Port forwarding You can forward port 80 and 443 to Ant Media Server, so you don’t have to use ports. You can use following iptables commands
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sudo iptables -t nat -A PREROUTING -p tcp --dport 80 -j REDIRECT --to-port 5080 sudo iptables -t nat -A PREROUTING -p tcp --dport 443 -j REDIRECT --to-port 5443 |
To make it permanent, edit
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vi /etc/ufw/before.rules |
[…]
To reinstall Kernel in Ubunru, you need to find the version of kernal installed, for this run
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dpkg -l | grep linux-image |
Or you can use command, find the kernel version you need to install
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apt-cache search linux-image |
Once you have the name of linux-image package you need to install, you can run
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apt-get install --reinstall PKG_NAME_HERE |
Example See apt, Ubuntu, Debian […]
Shotcut is an free open source video editor for Ubuntu. You can find more info at https://shotcut.org Latest version of Shotcut video editor can be installed on Ubuntu using command
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sudo snap install shotcut --classic |
shotcut is also available to be installed from apt, but this is slightly older version than snap. To install from apt, use command
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sudo apt install shotcut |
[…]
To configure IP in Ubuntu 20.04 guest, create file
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vi /etc/netplan/50-cloud-init.yaml |
add following content
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network: version: 2 ethernets: eth0: addresses: - YOUR_FO_IP_HERE/32 nameservers: addresses: - 1.1.1.1 search: [] optional: true routes: - to: 0.0.0.0/0 via: YOUR_GW_IP_HERE on-link: true |
example
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root@easyengine:~# cat /etc/netplan/50-cloud-init.yaml network: version: 2 ethernets: eth0: addresses: - 164.132.150.95/32 nameservers: addresses: - 1.1.1.1 search: [] optional: true routes: - to: 0.0.0.0/0 via: 51.255.79.254 on-link: true root@easyengine:~# |
Test network config using
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netplan try |
If everything works fine, you can apply the changes with
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netplan apply |
See OVH, netplan […]
Left Shift key on my keyboard started acting up. It some times work, some times it won’t. I never use the caps lock key on my kayboard, this is just above the shift key. So i decided to use this key as left shift key. To re-assign key, you need to edit file /usr/share/X11/xkb/symbols/pc Lets […]
First check if you have file
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/etc/cloud/cloud.cfg.d/subiquity-disable-cloudinit-networking.cfg |
If the file exists, make sure, you have following content in it.
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root@ubuntu:~# cat /etc/cloud/cloud.cfg.d/subiquity-disable-cloudinit-networking.cfg network: {config: disabled} root@ubuntu:~# |
Edit
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vi /etc/netplan/00-installer-config.yaml |
Replace all content with
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network: version: 2 ethernets: eth0: addresses: [192.168.1.100/24] gateway4: 192.168.1.1 nameservers: addresses: [1.1.1.1, 8.8.8.8] |
In above cause 192.168.1.100 is your static IP address. 192.168.1.1 is the gateway. eth0 is network interface name. Now try the chnages with
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netplan try |
If all good, you […]
On Ubuntu 20.04 settins won’t open. This may be caused by some software install/update. I tried to run
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gnome-control-center |
From terminal, i get error
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boby@sok-01:~$ gnome-control-center Command 'gnome-control-center' not found, but can be installed with: sudo apt install gnome-control-center boby@sok-01:~$ |
To fix the error, i installed gnome-control-center package as the error suggests.
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sudo apt install gnome-control-center |
See Ubuntu […]
Ubuntu Screen Recorder […]
Whem install csf firewall on Ubuntu 20.04, i get following error
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root@ok:~# csf *Error* The path to iptables is either not set or incorrect for IPTABLES [/usr/sbin/ip6tables] in /etc/csf/csf.conf at /usr/local/csf/lib/ConfigServer/URLGet.pm line 26. Compilation failed in require at /usr/sbin/csf line 21. BEGIN failed--compilation aborted at /usr/sbin/csf line 21. root@ok:~# |
This is because path for iptables is changed in Ubuntu 20.04. To fix the error edit csf.conf
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vi /etc/csf/csf.conf |
Find
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IPTABLES = "/sbin/iptables" IPTABLES_SAVE = "/sbin/iptables-save" IPTABLES_RESTORE = "/sbin/iptables-restore" IP6TABLES = "/sbin/ip6tables" IP6TABLES_SAVE = "/sbin/ip6tables-save" IP6TABLES_RESTORE = "/sbin/ip6tables-restore" |
Replace with
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IPTABLES = "/usr/sbin/iptables" IPTABLES_SAVE = "/usr/sbin/iptables-save" IPTABLES_RESTORE = "/usr/sbin/iptables-restore" IP6TABLES = "/usr/sbin/ip6tables" IP6TABLES_SAVE = "/usr/sbin/ip6tables-save" IP6TABLES_RESTORE = "/usr/sbin/ip6tables-restore" |
Now restart csf with csf -r, it will work.
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csf -r systemctl restart lfd |
See csf […]