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--- deb11:setup [2022/09/22 21:46] – Bernard Condrau
+++ deb11:setup [2024/12/13 12:04] (current) – [Install and configure packages] Bernard Condrau
@@ Line 5: / Line 5: @@
 # adduser <user>
 # vi /etc/group (add <user> to line "sudo:x:27:<user>")</code>
-  * change the machine name:<code>sudo edit /etc/hostname
+  * (VPS) change the machine name:<code>sudo edit /etc/hostname
 sudo edit /etc/hosts</code>
-  * enable //force_color_prompt=yes// in file //~/.bashrc// and ///root/.bashrc//
+  * enable //force_color_prompt=yes// in file ''~/.bashrc''
+  * copy ''/home/user/.bashrc'' to ''/root'' and modify PS1 prompt color (//32m// --> //31m//)
-===== Install additional Apps =====
+===== Security =====
+  * Configure [[deb9:ssh|SSH Access]]
+  * Install [[deb9:ufw|UFW Firewall]]
+  * Disable root login by changing file ''/etc/passwd'' from line 1 to line 2<code>root:x:0:0:root:/root:/bin/bash
+root:x:0:0:root:/root:/sbin/nologin</code>
+===== Install and configure packages =====
+  * Additional packages<code>$ sudo apt update
+$ sudo apt install vim
+$ sudo apt install zip
+$ sudo apt install rename
+$ sudo apt install rsync
+$ sudo apt install openjdk-17-jre openjdk-17-jdk</code>
+  * Change visudo editor<code>$ sudo update-alternatives --config editor</code>
+===== Upgrade linux headers =====
+  * Check remaining space on the boot partition with:<code>df -h | grep "^/dev/"</code>
+  * Remove outdated kernel packages:<code>sudo apt-get autoremove</code>
+  * First check your kernel version, so you won't delete the in-use kernel image, running:<code>uname -r</code>
+  * Delete the kernels you don't want/need anymore by running this:<code>sudo apt-get remove linux-image-VERSION</code>
+  * Update grub kernel list:<code>sudo update-grub</code>
+===== System Startup =====
+Debian 11 uses Systemd, not SysV, that's why your commands in ''/etc/rc.local'' file would not run at system boot time. This guide explains how to enable ''/etc/rc.local'' script to run on system startup.
+  - Create a rc.local unit file, follow [[deb10:rclocal|Services - rc.local]]
+  - Create file rc.local in /etc with the following content:<code>vim /etc/rc.local
+#!/bin/sh -e
+#
+# rc.local
+#
+# This script is executed at the end of each multiuser runlevel.
+# Make sure that the script will "exit 0" on success or any other
+# value on error.
+#
+# In order to enable or disable this script just change the execution
+# bits.
+#
+# By default this script does nothing.
+exit 0</code>
+  - Add execute permissions and start daemon:<code>chmod +x /etc/rc.local
+systemctl daemon-reload
+systemctl start rc-local
+systemctl status rc-local
+● rc-local.service - /etc/rc.local Compatibility
+   Loaded: loaded (/lib/systemd/system/rc-local.service; static; vendor preset:
+  Drop-In: /lib/systemd/system/rc-local.service.d
+           └─debian.conf
+   Active: active (exited) since Sun 2019-05-05 10:55:29 +07; 11min ago
+  Process: 1443 ExecStart=/etc/rc.local start (code=exited, status=0/SUCCESS)
+    Tasks: 0 (limit: 4915)
+   CGroup: /system.slice/rc-local.service
+</code>
+  * [[https://www.linuxbabe.com/linux-server/how-to-enable-etcrc-local-with-systemd|How to Enable /etc/rc.local with Systemd]]
+  * [[https://stackoverflow.com/questions/44797694/where-is-rc-local-in-debian-9-debian-stretch|Where is rc.local in Debian 9 (Debian Stretch)]]
+===== System Shutdown =====
+  - Put a symbolic link to the script to be run at shutdown into /lib/systemd/system-shutdown
+  * [[https://unix.stackexchange.com/questions/347306/how-to-execute-scripts-in-usr-lib-systemd-system-shutdown-at-reboot-or-shutdow|How to execute scripts in /usr/lib/systemd/system-shutdown/ at reboot or shutdown?]]
+  * [[https://opensource.com/life/16/11/running-commands-shutdown-linux|How to run commands at shutdown on Linux]]

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