Preface

When we use the official Ubuntu server image to install it on the server, we can only log in to the account that was originally installed and set and use sudo su command to elevate privileges, but there is no root account that can log in through SSH. This is because after the root account is created, a random password will be set each time the computer is turned on and SSH login will be disabled. Therefore, it is not convenient for us to change the passwords one by one using nano and vim.

Windows All need to create a new .txt file and then change the suffix to .sh file and run it on Linux with ./root.sh
linux Just use nano or vim to create a root.sh and run it with ./

ubuntu exclusive

Only for intranet ubuntu (no need for security, just convenience)

```Bash #!/bin/bash

Enable root permissions

sed -i ’s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g’ /etc/ssh/sshd_config

Set root password

echo “root:awa114514” | chpasswd

Restart sshd service

systemctl restart sshd.service

echo “SSH ROOT permissions have been enabled and the password has been changed to awa114514”

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</details>

## Script compatible with all Linux distributions

> Written casually

<details>
<summary>Normal script compatible with all Linux distributions</summary>
```Bash
#!/bin/bash

# Check if the root password meets security requirements
if ! check_passwd; then
echo "The root password is not secure, please reset the root password"
exit 1
fi

# Prompt the user to confirm the operation
read -p "Are you sure to enable root permissions and set the root password? (y/n) " answer
if [[ $answer != "y" ]]; then
echo "The operation has been canceled"
exit 1
fi

# Check the system type
type=$(uname | tr '[:upper:]' '[:lower:]')

# Enable root permissions
case $type in
linux)
sed -i 's/#PermitRootLogin prohibit-password/PermitRootLogin yes/g' /etc/ssh/sshd_config
;;
*)
echo "This script is only for Linux systems"
exit 1
;;
esac

# Set root password
echo "root:$password" | chpasswd

# Restart sshd service
systemctl restart sshd.service

echo "SSH ROOT permission is enabled and password has been changed to $password"

Script compatible with CentOS, Ubuntu, Arch and Debian

Written casually

Script compatible with CentOS, Ubuntu, Arch and Debian

```Bash #!/bin/bash

Check if the root password meets security requirements

if ! check_passwd; then echo “The root password is not secure, please reset the root password” exit 1 fi

Prompt the user to confirm the operation

read -p “Are you sure you want to enable root permissions and set a root password? (y/n) " answer if [[ $answer != “y” ]]; then echo “The operation has been cancelled” exit 1 fi

Check the operating system

os=$(cat /etc/os-release | grep “PRETTY_NAME” | cut -d ‘=’ -f 2 | tr -d ‘”’)

Enable root permissions

case $os in “CentOS Linux”) sed -i ’s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g’ /etc/ssh/sshd_config ;; “Ubuntu”) sed -i ’s/#PermitRootLogin no/PermitRootLogin yes/g’ /etc/ssh/sshd_config ;; “Arch Linux”) sed -i ’s/#PermitRootLogin no/PermitRootLogin yes/g’ /etc/ssh/sshd_config ;; “Debian”) sed -i ’s/#PermitRootLogin prohibit-password/PermitRootLogin yes/g’ /etc/ssh/sshd_config ;; esac

Set root password

echo “root:awa114514” | chpasswd

Restart sshd service

systemctl restart sshd.service

echo “SSH ROOT permission is enabled and password has been changed to awa114514”

1
</details>

One-click script to set up SSH access for ROOT account

One-click script to start SSH access for root account in Linux

Preface

ubuntu exclusive

Enable root permissions

Set root password

Restart sshd service

Script compatible with CentOS, Ubuntu, Arch and Debian

Check if the root password meets security requirements

Prompt the user to confirm the operation

Check the operating system

Enable root permissions

Set root password

Restart sshd service