Several situations require system reinstallation#
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My VPS is cluttered with a lot of things and I want to restore it.
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There is a conflict between the things I had on my VPS before and the things I want to install now. Installation cannot proceed.
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My VPS has been invaded and turned into a mining machine, running at full capacity.
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I want to try other versions of BBR, but currently, ARM still loses connection.
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More pure and stable.
Update software packages to ensure smooth installation#
Check the current system version cat /etc/issue
Update software packages
apt-get update
apt-get install -y xz-utils openssl gawk file
DD new system#
dd system means reinstalling the system: the following represents resetting the system to Ubuntu 18.04, with the account/password: root/12345
Note: During the dd process, you must wait patiently and not perform random operations such as restarting in the background, as it may cause disconnection. Please wait patiently for 10-30 minutes.
bash <(wget --no-check-certificate -qO- 'https://moeclub.org/attachment/LinuxShell/InstallNET.sh') -u 18.04 -v 64 -a -firmware -p 12345
Explanation:
-d: Debian system version options: [7, 8, 9, 10, 11]
-u: Ubuntu system version options: [14.04, 16.04, 18.04, 20.04]
-p: Password
Change the password for the root user (skip this step if you don't want to change it)#
If you want to change the password for the root user, you can enter the following command. The password will not be displayed when you enter it, but you can blindly type it in. Enter it twice!
passwd
Install BBR#
Before installing BBR on this system, run the following command
apt update -y && apt install -y curl && apt install -y socat && apt install wget -y
Then run the BBR PLUS script
wget -N --no-check-certificate "https://raw.githubusercontent.com/chiakge/Linux-NetSpeed/master/tcp.sh" && chmod +x tcp.sh && ./tcp.sh
After running the command, the BBR script will automatically run. It is recommended to install BBR PLUS and choose: 2
Then restart and execute ./tcp.sh and choose: 7 to start BBRPlus acceleration
Finally, execute ./tcp.sh and choose: 10 and then restart the VPS.
Brick recovery#
Assuming you didn't see the above note and the dd process failed, or it could be caused by other reasons. You are unable to connect to your server via SSH and need to recover it.
The principle of brick recovery is: the server data is stored in the Oracle disk, which is the default 50G disk. This disk can be detached, mounted, and data can be reset. It can be understood as your USB flash drive, which can be unplugged, reset the system on another computer, and then plug it back in.
1. Create a backup instance#
Find another new instance with the same account; if not, create a free AMD instance.
SSH connection, then execute sudo -i to enter root;
2. Detach the disconnected instance disk#
Stop the disconnected instance: note that it is to stop, not terminate, it needs to be mounted later
Detach the boot volume
3. Mount the disconnected instance boot volume to the backup instance#
Backup instance -> Attached block storage
Select the detached disconnected boot volume, type ISCSI, access read and write
ISCSI needs to execute the mount detachment command on the host. Copy the link command here and use the detachment command later
Open the backup instance SSH, enter the copied connection command
4. dd additional disk#
Note: This system is a simplified version of the original author's Debian system, mainly for quick recovery of disconnection; if you need other systems after the disconnection is restored, you can use a script to dd again
1. Download the image:#
# ARM recovery package
cd /root && wget https://app.isos.cc/dabian.sdb.gz
2. dd system: gzip -dc /root/dabian.sdb.gz | dd of=/dev/sdb#
3. Open a new SSH window#
sudo -i
watch -n 5 pkill -USR1 ^dd$
Then go back to this window and you will find that dd is in progress. Just wait until the progress is complete. This dd needs to copy 3.2G of data.
5. dd is complete, detach the additional disk of the backup instance -> mount it as the boot disk of the disconnected instance#
1. Detach the additional disk, execute the detachment command in step 3-3, detach in the console#
2. Go back to the disconnected instance-boot volume and attach it back to the backup instance#
3. Start up and use the account/password: root/10086.fit to log in to the instance.#
Other Oracle systems can be accessed, but Ubuntu 20 cannot#
Before installing Baota on Ubuntu, you need to disable the firewall or clear the firewall rules
sudo iptables -P INPUT ACCEPT
sudo iptables -P FORWARD ACCEPT
sudo iptables -P OUTPUT ACCEPT
sudo iptables -F
sudo apt-get purge netfilter-persistent
reboot
// Or you can delete the rules and restart:
rm -rf /etc/iptables/rules.v4
rm -rf /etc/iptables/rules.v6
reboot
You can use the following command to add corresponding rules to allow the port
iptables -A INPUT -p tcp --dport port to be allowed -j ACCEPT
iptables -A OUTPUT -p tcp --sport port to be allowed -j ACCEPT
Keep-alive script#
bash <(wget -qO- --no-check-certificate https://gitlab.com/spiritysdx/Oracle-server-keep-alive-script/-/raw/main/oalive.sh)
Vmess one-click script#
apt update && apt install -y expect wget && wget -N git.io/233v334.sh && wget -N https://github.com/crazypeace/v2ray/raw/master/afk.exp && bash 233v334.sh
V2Ray based on Nginx vmess+ws+tls one-click installation script
wget -N --no-check-certificate -q -O install.sh "https://raw.githubusercontent.com/wulabing/V2Ray_ws-tls_bash_onekey/master/install.sh" && chmod +x install.sh && bash install.sh