meower1 / Linux-Optimizer

Linux Optimizer

Linux Optimizer

This Bash script automates the optimization of your Linux server.

It performs the following tasks:

0. Fix hosts file and DNS (temporarily).

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

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

   • Append 1.1.1.1, 1.0.0.1, 8.8.8.8 and 8.8.4.4 to /etc/resolv.conf.

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

1. Update, Upgrade, and Clean the server:

   • Update
   • Upgrade
   • Dist-Upgrade
   • AutoRemove
   • AutoClean
   • Clean

2. 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

3. Enable Packages at Server Boot.

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

5. Create & Enable SWAP File:

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

6. Enable IPv6 Support.

7. Optimize the SYSCTL Configs.

   • Optimize SWAP.
   • Optimize Network Settings.
   • Activate BBR.
   • Optimize the Kernel.

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

8. Optimize SSH:

   • Back up the original sshd_config file.
   • 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 & Compression.
   • Enable X11 Forwarding.

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

9. Optimize the System Limits:

   • ulimit -c -d -f -i -n -q -u -v -x -s -l optimizations.
   • Soft & Hard nproc limits.
   • Soft & Hard nofile limits.

10. Optimize UFW & Open Common Ports.

    • Open Ports 21, 22, 80, 443.
    • With IPv6, TCP & UDP.

Reboot at the end is Recommended.

Prerequisites

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

• Ubuntu & Debian:

apt install -y sudo wget

• CentOS & Fedora:

dnf install -y sudo wget

Run

Tested on: Ubuntu 18+, Debian 11+, CentOS 8+, Fedora 37+

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

sudo -i

Then:

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

Menu Image

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.