1, Server system configuration initialization
#/bin/bash # Install system performance analysis tools and others yum install gcc make autoconf vim sysstat net-tools iostat iftop iotp wget lrzsz lsof unzip openssh-clients net-tool vim ntpdate -y # Set time zone and synchronize time ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime if ! crontab -l |grep ntpdate & amp;>/dev/null ; then (echo "* 1 * * * ntpdate time.windows.com >/dev/null 2> & amp;1";crontab -l) |crontab fi # Disable selinux sed -i '/SELINUX/{s/permissive/disabled/}' /etc/selinux/config # Turn off the firewall if egrep "7.[0-9]" /etc/redhat-release & amp;>/dev/null; then systemctl stop firewalld systemctl disable firewalld elif egrep "6.[0-9]" /etc/redhat-release &>/dev/null; then service iptables stop chkconfig iptables off fi #History command displays operation time if ! grep HISTTIMEFORMAT /etc/bashrc; then echo 'export HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S `whoami` "' >> /etc/bashrc fi # SSH timeout if ! grep "TMOUT=600" /etc/profile &>/dev/null; then echo "export TMOUT=600" >> /etc/profile fi # Disable root remote login. Remember to add a normal user to the system and give su permission to root. sed -i 's/#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config # Disable scheduled tasks from sending emails to sed -i 's/^MAILTO=root/MAILTO=""/' /etc/crontab #Set the maximum number of open files if ! grep "* soft nofile 65535" /etc/security/limits.conf & amp;>/dev/null; then cat >> /etc/security/limits.conf << EOF * soft nofile 65535 *hard nofile 65535 EOF fi # System kernel optimization cat >> /etc/sysctl.conf << EOF net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_max_tw_buckets = 20480 net.ipv4.tcp_max_syn_backlog = 20480 net.core.netdev_max_backlog = 262144 net.ipv4.tcp_fin_timeout = 20 EOF # Reduce SWAP usage echo "0" > /proc/sys/vm/swappiness
2. Create multiple users in batches and set passwords
#!/bin/bash USER_LIST=$@ USER_FILE=./user.info for USER in $USER_LIST;do if ! id $USER & amp;>/dev/null; then PASS=$(echo $RANDOM |md5sum |cut -c 1-8) useradd $USER echo $PASS | passwd --stdin $USER &>/dev/null echo "$USER $PASS" >> $USER_FILE echo "$USER User create successful." else echo "$USER User already exists!" fi done
3. Check server utilization with one click
#!/bin/bash function cpu(){ util=$(vmstat | awk '{if(NR==3)print $13 + $14}') iowait=$(vmstat | awk '{if(NR==3)print $16}') echo "CPU - usage: ${util}%, waiting for disk IO corresponding usage: ${iowait}:${iowait}%" } function memory (){ total=`free -m |awk '{if(NR==2)printf "%.1f",$2/1024}'` used=`free -m |awk '{if(NR==2) printf "%.1f",($2-$NF)/1024}'` available=`free -m |awk '{if(NR==2) printf "%.1f",$NF/1024}'` echo "Memory - Total size: ${total}G , Used: ${used}G , Remaining: ${available}G" } disk(){ fs=$(df -h |awk '/^\/dev/{print $1}') for p in $fs; do mounted=$(df -h |awk '$1=="'$p'"{print $NF}') size=$(df -h |awk '$1=="'$p'"{print $2}') used=$(df -h |awk '$1=="'$p'"{print $3}') used_percent=$(df -h |awk '$1=="'$p'"{print $5}') echo "Hard disk - mount point: $mounted, total size: $size, usage: $used, usage rate: $used_percent" done } function tcp_status() { summary=$(ss -antp |awk '{status[$1] + + }END{for(i in status) printf i":"status[i]" "}') echo "TCP connection status - $summary" } cpu memory disk tcp_status
4. Find processes that occupy too much CPU memory
#!/bin/bash echo "-----------------------------CUP occupied top 10 sorting----------------------- ---------" ps -eo user,pid,pcpu,pmem,args --sort=-pcpu |head -n 10 echo "-----------------------------Sort the top 10 memory usage---------------------- ---------" ps -eo user,pid,pcpu,pmem,args --sort=-pmem |head -n 10
5. Check the real-time traffic of the network card
#!/bin/bash eth0=$1 echo -e "Traffic in--Traffic out" while true; do old_in=$(cat /proc/net/dev |grep $eth0 |awk '{print $2}') old_out=$(cat /proc/net/dev |grep $eth0 |awk '{print $10}') sleep 1 new_in=$(cat /proc/net/dev |grep $eth0 |awk '{print $2}') new_out=$(cat /proc/net/dev |grep $eth0 |awk '{print $10}') in=$(printf "%.1f%s" "$((($new_in-$old_in)/1024))" "KB/s") out=$(printf "%.1f%s" "$((($new_out-$old_out)/1024))" "KB/s") echo "$in $out" done
6. Script to monitor disk utilization of multiple servers
#!/bin/bash HOST_INFO=host.info for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); do #Get the username and port USER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO) PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO) #Create temporary files to save information TMP_FILE=/tmp/disk.tmp #Get host disk information through public key login ssh -p $PORT $USER@$IP 'df -h' > $TMP_FILE #Analyze disk space occupied USE_RATE_LIST=$(awk 'BEGIN{OFS="="}/^\/dev/{print $NF,int($5)}' $TMP_FILE) #Loop the disk list and make judgments for USE_RATE in $USE_RATE_LIST; do #Take out the value on the right side of the equal sign (=) and mount point name PART_NAME=${USE_RATE%=*} #Get the value to the left of the equal sign (=) Disk utilization USE_RATE=${USE_RATE#*=} #make judgment if [ $USE_RATE -ge 80 ]; then echo "Warning: $PART_NAME Partition usage $USE_RATE%!" echo "The disk space of server $IP is too high, please deal with it in time" | mail -s "Insufficient space warning" Your [email protected] else echo "The $PART_NAME directory space of server $IP is good" fi done done
7. Check whether the website is abnormal in batches and notify by email
#!/bin/bash URL_LIST="www.baidu.com www.ctnrs.com www.der-matech.net.cn www.der-matech.com.cn www.der-matech.cn www.der-matech.top www.der- matech.org" for URL in $URL_LIST; do FAIL_COUNT=0 for ((i=1;i<=3;i + + )); do HTTP_CODE=$(curl -o /dev/null --connect-timeout 3 -s -w "%{http_code}" $URL) if [ $HTTP_CODE -eq 200 ]; then echo "$URL OK" break else echo "$URL retry $FAIL_COUNT" let FAIL_COUNT + + fi done if [ $FAIL_COUNT -eq 3 ]; then echo "Warning: $URL Access failure!" echo "The website $URL is broken, please deal with it in time" | mail -s "$URL website is high risk" [email protected] fi done
8. Batch host remote execution command script
#!/bin/bash COMMAND=$* HOST_INFO=host.info for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); do USER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO) PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO) PASS=$(awk -v ip=$IP 'ip==$1{print $4}' $HOST_INFO) expect -c " spawn ssh -p $PORT $USER@$IP expect { "(yes/no)" {send "yes\r"; exp_continue} "password:" {send "$PASS\r"; exp_continue} "$USER@*" {send "$COMMAND\r exit\r"; exp_continue} } " echo "--------------------------" done
9. One-click deployment of LNMP website platform script
#!/bin/bash NGINX_V=1.15.6 PHP_V=5.6.36 TMP_DIR=/tmp INSTALL_DIR=/usr/local PWD_C=$PWD echo echo -e "\tMenu\\ " echo -e "1. Install Nginx" echo -e "2. Install PHP" echo -e "3. Install MySQL" echo -e "4. Deploy LNMP" echo -e "9. Quit" function command_status_check() { if [ $? -ne 0 ]; then echo $1 exit fi } function install_nginx() { cd $TMP_DIR yum install -y gcc gcc-c++ make openssl-devel pcre-devel wget wget http://nginx.org/download/nginx-${NGINX_V}.tar.gz tar zxf nginx-${NGINX_V}.tar.gz cd nginx-${NGINX_V} ./configure --prefix=$INSTALL_DIR/nginx \ --with-http_ssl_module \ --with-http_stub_status_module \ --with-stream command_status_check "Nginx - Platform environment check failed!" make -j 4 command_status_check "Nginx - Compilation failed!" make install command_status_check "Nginx - Installation failed!" mkdir -p $INSTALL_DIR/nginx/conf/vhost alias cp=cp ; cp -rf $PWD_C/nginx.conf $INSTALL_DIR/nginx/conf rm -rf $INSTALL_DIR/nginx/html/* echo "ok" > $INSTALL_DIR/nginx/html/status.html echo '<?php echo "ok"?>' > $INSTALL_DIR/nginx/html/status.php $INSTALL_DIR/nginx/sbin/nginx command_status_check "Nginx - Startup failed!" } function install_php() { cd $TMP_DIR yum install -y gcc gcc-c + + make gd-devel libxml2-devel \ libcurl-devel libjpeg-devel libpng-devel openssl-devel \ libmcrypt-devel libxslt-devel libtidy-devel wget http://docs.php.net/distributions/php-${PHP_V}.tar.gz tar zxf php-${PHP_V}.tar.gz cd php-${PHP_V} ./configure --prefix=$INSTALL_DIR/php \ --with-config-file-path=$INSTALL_DIR/php/etc \ --enable-fpm --enable-opcache \ --with-mysql --with-mysqli --with-pdo-mysql \ --with-openssl --with-zlib --with-curl --with-gd \ --with-jpeg-dir --with-png-dir --with-freetype-dir \ --enable-mbstring --enable-hash command_status_check "PHP - Platform environment check failed!" make -j 4 command_status_check "PHP - Compilation failed!" make install command_status_check "PHP - Installation failed!" cp php.ini-production $INSTALL_DIR/php/etc/php.ini cp sapi/fpm/php-fpm.conf $INSTALL_DIR/php/etc/php-fpm.conf cp sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm chmod +x /etc/init.d/php-fpm /etc/init.d/php-fpm start command_status_check "PHP - Startup failed!" } read -p "Please enter the number:" number case $number in 1) install_nginx;; 2) install_php;; 3) install_mysql;; 4) install_nginx install_php ;; 9) exit;; esac
10. Script to monitor whether the MySQL master-slave synchronization status is abnormal
#!/bin/bash HOST=localhost USER=root PASSWD=123.com IO_SQL_STATUS=$(mysql -h$HOST -u$USER -p$PASSWD -e 'show slave status\G' 2>/dev/null |awk '/Slave_.*_Running:/{print $1$2 }') for i in $IO_SQL_STATUS; do THREAD_STATUS_NAME=${i%:*} THREAD_STATUS=${i#*:} if [ "$THREAD_STATUS" != "Yes" ]; then echo "Error: MySQL Master-Slave $THREAD_STATUS_NAME status is $THREAD_STATUS!" |mail -s "Master-Slave Staus" [email protected] fi done
11. MySql database backup script
Branch database backup
mysqldump -uroot -pxxx -B A > A.sql #!/bin/bash DATE=$(date + %F_%H-%M-%S) HOST=localhost USER=backup PASS=123.com BACKUP_DIR=/data/db_backup DB_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "show databases;" 2>/dev/null |egrep -v "Database|information_schema|mysql|performance_schema|sys\ ") for DB in $DB_LIST; do BACKUP_NAME=$BACKUP_DIR/${DB}_${DATE}.sql if ! mysqldump -h$HOST -u$USER -p$PASS -B $DB > $BACKUP_NAME 2>/dev/null; then echo "$BACKUP_NAME backup failed!" fi done
Table backup
mysqldump -uroot -pxxx -A t > t.sql #!/bin/bash DATE=$(date + %F_%H-%M-%S) HOST=localhost USER=backup PASS=123.com BACKUP_DIR=/data/db_backup DB_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "show databases;" 2>/dev/null |egrep -v "Database|information_schema|mysql|performance_schema|sys\ ") for DB in $DB_LIST; do BACKUP_DB_DIR=$BACKUP_DIR/${DB}_${DATE} [ ! -d $BACKUP_DB_DIR ] & & mkdir -p $BACKUP_DB_DIR &>/dev/null TABLE_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "use $DB;show tables;" 2>/dev/null) for TABLE in $TABLE_LIST; do BACKUP_NAME=$BACKUP_DB_DIR/${TABLE}.sql if ! mysqldump -h$HOST -u$USER -p$PASS $DB $TABLE > $BACKUP_NAME 2>/dev/null; then echo "$BACKUP_NAME backup failed!" fi done done
12. Nginx access log analysis
#!/bin/bash # Log format: $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for" LOG_FILE=$1 echo "Statistics on the 10 most visited IPs" awk '{a[$1] + + }END{print "UV:",length(a);for(v in a)print v,a[v]}' $LOG_FILE |sort -k2 -nr |head -10 echo "---------------------" echo "The most visited IPs during the statistical period" awk '$4>="[01/Dec/2018:13:20:25" & amp; & amp; $4<="[27/Nov/2018:16:20:49"{a[ $1] + + }END{for(v in a)print v,a[v]}' $LOG_FILE |sort -k2 -nr|head -10 echo "---------------------" echo "Statistics on the 10 most visited pages" awk '{a[$7] + + }END{print "PV:",length(a);for(v in a){if(a[v]>10)print v,a[v]} }' $LOG_FILE |sort -k2 -nr echo "---------------------" echo "Statistics on the number of status codes accessed to the page" awk '{a[$7" "$9] + + }END{for(v in a){if(a[v]>5)print v,a[v]}}' $LOG_FILE |sort - k3 -nr
13. Nginx access logs are automatically cut by day (week, month)
#!/bin/bash #nginxlog directory LOG_DIR=/www/server/nginx/logs #Get the time of the previous day YESTERDAY_TIME=$(date -d "yesterday" + %F) #Archive log retrieval time LOG_MONTH_DIR=$LOG_DIR/$(date + "%Y-%m") #The name of the archive log LOG_FILE_LIST="access.log" for LOG_FILE in $LOG_FILE_LIST; do [ ! -d $LOG_MONTH_DIR ] & amp; & amp; mkdir -p $LOG_MONTH_DIR mv $LOG_DIR/$LOG_FILE $LOG_MONTH_DIR/${LOG_FILE}_${YESTERDAY_TIME} done kill -USR1 $(cat $LOG_DIR/nginx.pid)
14. Automatically publish Java projects (Tomcat)
#!/bin/bash DATE=$(date + %F_%T) TOMCAT_NAME=$1 TOMCAT_DIR=/usr/local/$TOMCAT_NAME ROOT=$TOMCAT_DIR/webapps/ROOT BACKUP_DIR=/data/backup WORK_DIR=/tmp PROJECT_NAME=tomcat-java-demo # Pull code cd $WORK_DIR if [ ! -d $PROJECT_NAME ]; then git clone https://github.com/lizhenliang/tomcat-java-demo cd $PROJECT_NAME else cd $PROJECT_NAME git pull fi # Construct mvn clean package -Dmaven.test.skip=true if [ $? -ne 0 ]; then echo "maven build failure!" exit 1 fi # deploy TOMCAT_PID=$(ps -ef |grep "$TOMCAT_NAME" |egrep -v "grep|$$" |awk 'NR==1{print $2}') [ -n "$TOMCAT_PID" ] & amp; & amp; kill -9 $TOMCAT_PID [ -d $ROOT ] & amp; & amp; mv $ROOT $BACKUP_DIR/${TOMCAT_NAME}_ROOT$DATE unzip $WORK_DIR/$PROJECT_NAME/target/*.war -d $ROOT $TOMCAT_DIR/bin/startup.sh
15. Automatically publish PHP projects
#!/bin/bash DATE=$(date + %F_%T) WWWROOT=/usr/local/nginx/html/$1 BACKUP_DIR=/data/backup WORK_DIR=/tmp PROJECT_NAME=php-demo # Pull code cd $WORK_DIR if [ ! -d $PROJECT_NAME ]; then git clone https://github.com/lizhenliang/php-demo cd $PROJECT_NAME else cd $PROJECT_NAME git pull fi # deploy if [ ! -d $WWWROOT ]; then mkdir -p $WWWROOT rsync -avz --exclude=.git $WORK_DIR/$PROJECT_NAME/* $WWWROOT else rsync -avz --exclude=.git $WORK_DIR/$PROJECT_NAME/* $WWWROOT fi
16. DOS attack prevention (automatic blocking of attack IP)
#!/bin/bash DATE=$(date + %d/%b/%Y:%H:%M) #nginxlog LOG_FILE=/usr/local/nginx/logs/demo2.access.log #Analyze IP access status ABNORMAL_IP=$(tail -n5000 $LOG_FILE |grep $DATE |awk '{a[$1] + + }END{for(i in a)if(a[i]>10)print i}') for IP in $ABNORMAL_IP; do if [ $(iptables -vnL |grep -c "$IP") -eq 0 ]; then iptables -I INPUT -s $IP -j DROP echo "$(date + '%F_%T') $IP" >> /tmp/drop_ip.log fi done
17. Directory intrusion detection and alarm
#!/bin/bash MON_DIR=/opt inotifywait -mqr --format %f -e create $MON_DIR |\ while read files; do #Sync files rsync -avz /opt /tmp/opt #Check whether the file has been modified #echo "$(date + '%F %T') create $files" | mail -s "dir monitor" [email protected] done