DevOps_snippets - master - noxit/DevOps_practices

DevOps_snippets
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noxit
DevOps_snippets
11 ноя 2025, 00:53
11 ноя 2025, 00:53c09f377
----------- Stop and remove all Docker containers
docker stop $(docker ps -a -q) && docker rm $(docker ps -a -q)


----------- Monitor system logs in real-time
tail -f /var/log/syslog


----------- Search for files containing specific text
SEARCH_DIR="/path/to/search/directory"
  SEARCH_TEXT="search-text"

    grep -rl "${SEARCH_TEXT}" ${SEARCH_DIR}


----------- Add prefix to all files in a directory
DIRECTORY="/path/to/directory"
  PREFIX="new_prefix_"
  
  for FILE in ${DIRECTORY}/*
  do
      mv ${FILE} ${DIRECTORY}/${PREFIX}$(basename ${FILE})
  done


----------- Monitor log files for a certain pattern
tail -f $LOG_FILE | grep $SEARCH_PATTERN


----------- Monitor system usage and resource consumption
while true
  do
      clear
      echo "====== System Usage & Resource Consumption ======"
      echo "CPU Usage"
      echo "------------------------------------------------"
      top -b -n1 | head -10
      echo " "
      echo "Free Memory"
      echo "------------------------------------------------"
      free -h
      echo " "
      echo "Disk Usage"
      echo "------------------------------------------------"
      df -h
      sleep 15
  done


----------- Script to clean up old log files
DIRECTORY="/var/log"
  DAYS=14
  
  echo "Deleting log files older than $DAYS days in $DIRECTORY..."
  find "$DIRECTORY" -name "*.log" -type f -mtime +$DAYS -exec rm -f {} \;
  echo "Log files cleanup completed successfully."


----------- Script to backup a directory
SOURCE="/path/to/source/directory"
  DESTINATION="/path/to/destination/directory"
  DATE=$(date +%Y-%m-%d)
  FILENAME="backup_$DATE.tar.gz"
  
  echo "Starting backup of $SOURCE to $DESTINATION/$FILENAME..."
  tar -czvf "$DESTINATION/$FILENAME" $SOURCE
  echo "Backup completed successfully."


----------- Show disks with high usage
df -h | grep -vE '^Filesystem|tmpfs|cdrom' | awk '{ print $5 " " $1 " " $6 }' | while read output;
  do
    usage=$(echo $output | awk '{ print $1}' | cut -d'%' -f1)
    partition=$(echo $output | awk '{ print $2 }')
    mount_point=$(echo $output | awk '{ print $3 }')
    if [ $usage -ge 80 ]; then
      echo "Warning: Disk space usage on $partition ($mount_point) is at ${usage}%"
    fi
  done


----------- Restart Service
systemctl restart $SERVICE_NAME


----------- Track Open Ports and Listening Services
echo "Open Ports and Listening Services:"
  sudo netstat -tulpn | grep LISTEN


----------- Backup Files to Remote Server
DATE=$(date +%Y%m%d)
  SOURCE_DIR="/path/to/source/directory"
  BACKUP_FILE="backup-$DATE.tar.gz"
  REMOTE_USER="remote_user"
  REMOTE_SERVER="remote_server"
  REMOTE_DIR="/path/to/remote/directory"
  
  tar -czvf $BACKUP_FILE $SOURCE_DIR
  scp $BACKUP_FILE $REMOTE_USER@$REMOTE_SERVER:$REMOTE_DIR
  rm -f $BACKUP_FILE
  echo "Backup completed and transferred to the remote server."


----------- Available free space on the system
du -hsx /* | sort -rh | head -5