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Linux Optimizer

This Bash script automates the optimization of your Linux server.

It performs the following tasks:

  1. Fix hosts file and DNS (temporarily):

    • Check and add 127.0.1.1 and server hostname to /etc/hosts.

    Original hosts file is backed up at /etc/hosts.bak.

    • Add 77.88.8.8 and 1.1.1.1 to /etc/resolv.conf.

    Original dns file is backed up at /etc/resolv.conf.bak.

  2. Update, Upgrade, and Clean the server:

    • Update
    • Upgrade
    • Full-Upgrade
    • AutoRemove
    • AutoClean
    • Clean

  3. Install XanMod LTS Kernel (Only on Ubuntu & Debian):

  4. Install Useful Packages:

    apt-transport-https apt-utils autoconf automake bash-completion bc binutils binutils-common binutils-x86-64-linux-gnu build-essential busybox ca-certificates cron curl dialog epel-release gnupg2 git haveged htop iptables iptables-persistent jq keyring libssl-dev libsqlite3-dev libtool locales lsb-release make nano net-tools nftables packagekit preload python3 python3-pip qrencode socat screen software-properties-common ufw unzip vim wget zip

  5. Enable Packages at Server Boot.

  6. Set the server TimeZone to the VPS IP address location.

  7. Create & Enable SWAP File:

    • Swap Path: "/swapfile"
    • Swap Size: 2Gb

  8. Enable IPv6 Support.

  9. Optimize the SYSCTL Configs:

    • Optimize SWAP.
    • Optimize Network Settings.
    • Activate BBR (BBRv3 with XanMod).
    • Optimize the Kernel.

    Original file is backed up at /etc/sysctl.conf.bak.

  10. Optimize SSH:

    • Disable DNS lookups for connecting clients.
    • Remove less efficient encryption ciphers.
    • Enable and Configure TCP keep-alive messages.
    • Allow agent & TCP forwarding.
    • Enable gateway ports, Tunneling and compression.
    • Enable X11 Forwarding.

    Original file is backed up at /etc/ssh/sshd_config.bak.

  11. Optimize the System Limits:

    • Soft and Hard ulimit -c -d -f -i -l -n -q -s -u -v -x optimizations.

  12. Optimize UFW and open Common Ports:

    • Open Ports SSH, 80, 443.
    • With IPv6, TCP & UDP.

Reboot at the end is Recommended.

Prerequisites

Ensure that the sudo, wget and jq packages are installed on your system:

  • Ubuntu & Debian:
apt update -q && apt install -y sudo wget jq
  • CentOS & Fedora:
dnf up -y && dnf install -y sudo wget jq

Run

Tested on: Ubuntu 20+, Debian 11+, CentOS Stream 8+, AlmaLinux 8+, Fedora 37+

Root Access is Required. If the user is not root, first run:

sudo -i

Then:

wget "https://raw.githubusercontent.com/dpteam/Linux-Optimizer/main/linux-optimizer.sh" -O linux-optimizer.sh && chmod +x linux-optimizer.sh && bash linux-optimizer.sh

Menu Image

Debian & Ubuntu:

debian-based-menu

CentOS, AlmaLinux & Fedora:

rhel-based-menu

Disclaimer

This script is provided as-is, without any warranty or guarantee. Use it at your own risk.

License

This script is licensed under the MIT License.