Siemens SIMATIC S7-1500 Manual page 29

4. Change the default password after the first startup of the CPU.
5. Change the IP address or configure DHCP using the "bridge.network" script in the
"/etc/systemd/network" directory by entering the following commands in the given
sequence.
– "cd /etc/systemd/network" to switch to the specified directory.
– "ls -l" to list all the files/directories in this directory.
– "pico bridge.network" to open the script "bridge.network" in the Pico text editor.
– Change the IP address settings in the script.
– Press CTRL + X to exit the text editor.
– Press CTRL + Y to select overwriting of the script.
– Press ENTER to save the change and close the text editor.
6. Transfer your configuration to the memory card and load the "systemd networkd" module
once again by calling "sync && systemctl restart systemd-networkd" as the root user.
7. Create your own user account in the Linux subsystem without root privileges. Work with
this user account.
NOTE
Extending the service life of storage media
When you modify files in the Linux file system, use the "sync" command to write important
data immediately to the containers of the memory card.
If you do not use the "sync" command, the changed data will be automatically transferred to
the memory card with a delay of approximately 40 seconds. In this manner, you can extend
the service life of your SIMATIC memory card.
You can find more information on configuring PuTTY and creating C/C++ Runtime
applications in the SIMATIC S7-1500 ODK 1500S
(https://support.industry.siemens.com/cs/ww/en/ps/13914/man) manual.
Security information
NOTE
• Follow the Principle of Least Privilege.
• Start your application as a user without root privileges.
• Configure the SSH server in Linux Runtime in such a way that it only permits certificate-
based authentication. Disable password-based authentication for all users.
• Change the user passwords regularly and use secure passwords.
CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)
Equipment Manual, 11/2022, A5E40882737-AC
Product overview
3.4 Firmware functions
29