Virmach 128M BBR/Ruisu, choose one of the two optimization solutions.

This article uses Virmach’s cheapest VPS of $5/year for testing. For VPS evaluation, please see the following article:

#CHEAPVPS#5 dollars a year 1 core 128M 5G 250G 1Gbps Los Angeles: virmach

This tutorial uses Debian as an example: The first step is to reinstall a pure system provided by non-commercial companies

First, reinstall Debian 7/8 in the Virmach control panel. If so, there is no need to install it, in preparation for reinstalling the folk pure system below. Download script

wget --no-check-certificate -qO InstallNET.sh 'https://moeclub.org/attachment/LinuxShell/InstallNET.sh' && chmod a+x InstallNET.sh

Ruisu, reinstall to Debian 7 32-bit

bash InstallNET.sh -d 7 -v 32 -a

BBR, reinstall to Debian 8 64-bit

bash InstallNET.sh -d 8 -v 64 -a

The default password for SSH login is: Vicer

Explanation, this installed system will automatically add swap virtual memory twice the physical memory, 128×2=256 256 virtual memory is enough. For VPS with small memory, it is still necessary to use swap!

The second step, kernel parameter optimization

1. Increase the maximum number of system file descriptors

Edit the file limits.conf vi /etc/security/limits.conf Finally, add two lines to add the command:

* soft nofile 51200 *hard nofile 51200

If you find that the contents of the limits.conf file already exist, please modify it to the above.

Edit file profile Finally, add a new line to add the command. vi /etc/profile

ulimit -SHn 51200

Restart after modification and check whether the command takes effect: ulimit -n

2. Adjust kernel parameters Modify the configuration file sysctl.conf vi /etc/sysctl.conf Finally, add a new line to add the command:

fs.file-max = 51200 net.core.rmem_max = 67108864 net.core.wmem_max = 67108864 net.core.rmem_default = 65536 net.core.wmem_default = 65536 net.core.netdev_max_backlog = 4096 net.core.somaxconn = 4096 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_fin_timeout = 30 net.ipv4.tcp_keepalive_time = 1200 net.ipv4.ip_local_port_range = 10000 65000 net.ipv4.tcp_max_syn_backlog = 4096 net.ipv4.tcp_max_tw_buckets = 5000 net.ipv4.tcp_fastopen = 3 net.ipv4.tcp_rmem = 4096 87380 67108864 net.ipv4.tcp_wmem = 4096 65536 67108864 net.ipv4.tcp_mtu_probing = 1 net.ipv4.tcp_congestion_control = hybla vm.min_free_kbytes = 5120 vm.overcommit_memory = 1 vm.panic_on_oom = 1 vm.swappiness = 80 vm.vfs_cache_pressure = 200

The third step, install BBR or Ruisu

1. Violent BBR Reference: https://github.com/tcp-nanqinlang/wiki/wiki/general Installation:

wget https://github.com/tcp-nanqinlang/general/releases/download/3.4.2.1/tcp_nanqinlang-fool-1.3.0.sh bash tcp_nanqinlang-fool-1.3.0.sh

2. Rapid speed Installation:

wget --no-check-certificate -O appex.sh https://raw.githubusercontent.com/0oVicero0/serverSpeeder_Install/master/appex.sh && chmod x appex.sh && bash appex.sh install

Ruisu optimization parameters: Edit file: vi /appex/etc/config

initialCwndWan="65" shaperEnable="0" SmBurstMS="20" shortRttMS="90"

Just change the value to the one above. Restart Ruisu /appex/bin/serverSpeeder.sh restart

Ruisu users must choose, otherwise they will explode. Debian or Ubuntu next click to install the libev version

To simplify it further, it is to uninstall apt-get remove rsyslog At the same time, be sure to modify the SSH port.

For VPS with small memory, I strongly recommend installing a 32-bit system.

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