A big script about updating the Fedora 42 operating system on Linux.
- checking the internet connection (important for the download of the updates)
- checking whether the user is root (a lot of commands only works with sudo rights)
- checking the status whether databases and Node.js is working
- checking whether there is a new kernel and checking the size of the folder /boot -because dnf will install there the kernel.
- starting the update process
- checking the rootkits
- checking the installed kernels
- checking the kernel errors
- checking the journal log size
- deleting older journal entries
- deleting the dnf cache
- checking the /tmp size of the service systemd-tmpfiles-clean deletes the content of /tmp
- checking DNF cach size
- checking the size of /var/log
#!/bin/bash
clear
#set -e # Keep to stop the script in case of errors (good practice)
echo "-------------------------------------"
echo "Updates and maintenance for Fedora"
echo "-------------------------------------"
# --- 1. Systemstatus und Begrüßung ---
# Checking whether there is an internet connection
A=$(nmcli device status | grep eno1 | awk '{print $3}')
if [[ "$A" == "verbunden" ]]; then
echo "✅ Internet connection available on eno1."
else
echo "❌ NO Internet connection available, check your router."
fi
# Printing the current date
DATUM=$(date +%x)
EINSCHALTZEIT=$(uptime -s | awk '{print $2}')
echo "Hallo $USER, heute ist der $DATUM. Der Rechner wurde um $EINSCHALTZEIT eingeschaltet."
echo
# Checking whether I'm root or not. I need to be root in order to run this script
BENUTZER="$USER"
if [[ "$BENUTZER" == "root" ]]; then
echo "Ich bin Root. Starte Wartungsprozesse."
# ----------------------------------------------------
# 🛑 NEU: Status of databases and Node.js (Fits perfectly here!)
echo "----------------------------------------------------"
echo "Review of ongoing database and development processes"
echo "----------------------------------------------------"
# MariaDB Check
if systemctl is-active mariadb &> /dev/null; then
echo "✅ MariaDB: Database server is running."
else
echo "❌ MariaDB: Database server is inactive."
fi
# MongoDB Check
if systemctl is-active mongod &> /dev/null; then
echo "✅ MongoDB: Database server is running."
else
echo "❌ MongoDB: Database server is inactive."
fi
# Node.js Check
NODE_COUNT=$(pgrep node | wc -l)
if [ "$NODE_COUNT" -gt 0 ]; then
echo "⚠️ Node.js: $NODE_COUNT Node.js processes are currently running!"
# Auflistung der PIDs, falls nötig
pgrep node
else
echo "✅ Node.js: No active Node.js processes found."
fi
echo "----------------------------------------------------"
# --- 2. Maintenance and updates ---
echo "----------------------------------------------------"
echo "Preliminary check: kernel updates & boot memory"
echo "----------------------------------------------------"
# 1. check whether there is a new kernel
KERNEL_UPDATE=$(dnf check-update kernel -q)
if [ -n "$KERNEL_UPDATE" ]; then
echo "🆕 A new kernel update has been found!"
# 2. check the size in /boot
BOOT_AVAIL=$(df -m /boot --output=avail | tail -1 | tr -d ' ')
# Safety margin: A new kernel requires approximately 150 MB.
# (including reserve for generating initramfs)
SCHWELLE=200
echo "Verfügbarer Platz in /boot: ${BOOT_AVAIL} MB"
if [ "$BOOT_AVAIL" -lt "$SCHWELLE" ]; then
echo "❌ CANCEL: The space in /boot is too less (${BOOT_AVAIL} MB)!"
echo "A kernel update requires approximately 150-200 MB of free buffer space."
echo
echo "Please execute this command first to make space:"
echo "sudo dnf remove \$(dnf repoquery --installonly --latest-limit=-2 -q)"
echo
exit 1
else
echo "✅ Sufficient space available for the kernel update."
fi
else
echo "✅ No kernel update in queue. Normal update will continue.""
fi
echo "----------------------------------------------------"
# query new updates
echo "Starte Update-Anfrage..."
# Da das Skript bereits als Root läuft, ist 'sudo' nicht nötig
dnf upgrade -y --refresh --exclude=ffmpeg-free
echo "----------------------------------------------"
# checking to rootkits
echo "Checking Rootkits (chkrootkit)"
# '| true' ist gut, um sicherzustellen, dass das Skript nicht stoppt
chkrootkit 2>/dev/null || true
echo "----------------------------------------------"
echo "Kontrolle der installierten Kernel"
# Counts the lines of the installed kernel packages
KERNEL_ANZAHL=$(rpm -q kernel | wc -l)
echo "Aktuell sind $KERNEL_ANZAHL Kernel installiert:"
rpm -q kernel
# Small warning message if the limit (3) is exceeded
if [ "$KERNEL_ANZAHL" -gt 3 ]; then
echo "⚠️ Hinweis: Mehr als 3 Kernel installiert. Prüfen Sie die dnf.conf!"
fi
echo "----------------------------------------------"
echo "----------------------------------------------"
# kernel errors
echo "Prüfung auf Kernel-Fehler im letzten Boot-Vorgang:"
journalctl -kb -1 | grep -i 'kernel panic\|BUG:\|oops\|segfault\|NMI watchdog'
echo "----------------------------------------------"
# journalctl size check and vacuum
echo "Prüfung Journal-Loggröße:"
journalctl --disk-usage
echo "Journal Logfiles löschen (älter als 1 Tag)"
journalctl --vacuum-time=1d
echo "----------------------------------------------"
# delete the dnf cache
echo "DNF Cache löschen"
dnf clean packages
dnf clean metadata
dnf clean dbcache
echo "----------------------------------------------"
# checking the /tmp folder size (Kann wegen systemd-tmpfiles-clean entfernt werden, aber der Check schadet nicht)
TMP_SIZE_KB=$(du -sk /tmp/ | awk '{print $1}')
THRESHOLD_KB=400 # 400 KB
echo "Prüfung /tmp Ordnergröße"
if (( TMP_SIZE_KB > THRESHOLD_KB )); then
echo "⚠️ Warnung: /tmp ist größer als $THRESHOLD_KB KB. Aktuelle Größe: $TMP_SIZE_KB KB"
else
echo "✅ Die Größe von /tmp ist unter $THRESHOLD_KB KB. Aktuelle Größe: $TMP_SIZE_KB KB"
fi
echo "---------------------------------------------"
# Check DNF cache size
ORDNER_DNF="/var/cache/dnf"
SIZE_MB_DNF=$(du -sm "$ORDNER_DNF" | cut -f1)
LIMIT_MB_DNF=1024 # 1 GB
echo "Prüfung DNF Cache Größe:"
echo "Aktuelle DNF Cache Größe: $(du -sh "$ORDNER_DNF" | cut -f1)"
if [ "$SIZE_MB_DNF" -gt "$LIMIT_MB_DNF" ]; then
echo "Achtung: Der Ordner '$ORDNER_DNF' ist größer als 1 GB."
else
echo "✅️ Der Ordner '$ORDNER_DNF' ist unter 1 GB."
fi
echo
echo "---------------------------------------------"
# Check the size of /var/log
ORDNER_LOG="/var/log"
SIZE_MB_LOG=$(du -sm "$ORDNER_LOG" | cut -f1)
LIMIT_MB_LOG=1024 # 1 GB
echo "Prüfung /var/log Ordnergröße:"
echo "Aktuelle /var/log Größe: $(du -sh "$ORDNER_LOG" | cut -f1)"
if [ "$SIZE_MB_LOG" -gt "$LIMIT_MB_LOG" ]; then
echo "Achtung: Der Ordner '$ORDNER_LOG' ist größer als 1 GB."
else
echo "✅ Der Ordner '$ORDNER_LOG' ist unter 1 GB."
fi
echo
echo "----------------------------------------------"
echo
echo "Finish, Ende, an die Arbeit 💼️"
else
echo "❌ Error: I currently do not have root privileges. The update script requires root privileges."
fi
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