diff --git a/osMonitor.sh b/osMonitor.sh
new file mode 100644
index 0000000..697a221
--- /dev/null
+++ b/osMonitor.sh
@@ -0,0 +1,105 @@
+#!/usr/bin/bash
+
+# os check
+# build 2021-06-16
+
+#1、磁盘根分区剩余百分比                        			#返回数值，并添加触发器报警
+function disk(){
+    local _part _disk
+    _part=$(lsblk -b |grep "centos-root"|awk '{print $(NF-3)}'|awk -F'G' '{print $1}')
+    _disk=$(lsblk -b |grep sda|grep disk|awk '{print $(NF-2)}'|awk -F'G' '{print $1}')
+    echo "scale=2;a=${_part}/${_disk};if (length(a)==scale(a)) print 0;print a " |bc
+}
+
+#2、内存剩余百分比										#返回数值
+function memory(){
+    local _memFree _memTotal
+    _memFree=$(free -b |awk 'NR==2{print $4}')
+    _memTotal=$(free -b |awk 'NR==2{print $2}')
+    echo "scale=2;a=${_memFree}/${_memTotal};if (length(a)==scale(a)) print 0;print a " |bc
+}
+
+#3、swap使用情况											#返回数值
+function memory(){
+    free -m |awk 'NR==3{print $3}'
+}
+
+#4、cpu 1、5、15分钟负载									#返回数值或其他类型
+function cpuLoad(){
+    case $1 in
+    1)
+        uptime |awk '{print $(NF-2)}'|awk -F',' '{print $1}'
+    ;;
+    5)
+        uptime |awk '{print $(NF-1)}'|awk -F',' '{print $1}'
+    ;;
+    15)
+        uptime |awk '{print $(NF)}'|awk -F',' '{print $1}'
+    esac
+}
+
+#5、/etc/passwd /etc/shadow /etc/sodoers 等文件修改情况	#返回任意类型，并添加触发器报警
+function fileMD5(){
+    [ ! -f /tmp/md5.hash ] && md5sum /etc/passwd /etc/shadow /etc/sudoers > /tmp/md5sum && echo "数据收集中"
+    md5sum -c /tmp/md5.hash |grep -E "FAILED|失败"
+}
+
+#6、系统启动时间											#返回任意类型
+function uptime(){
+    local _uptime _idletime
+    _uptime=$(cat /proc/uptime |awk '{print ($1/60)}') # 单位为分钟
+    _idletime=$(cat /proc/uptime |awk '{print ($2/60)}') # 系统空闲时间
+    case $1 in
+    upTime)
+        echo $_uptime
+    ;;
+    idleTime)
+        echo $_idletime
+    ;;
+    idle)
+        echo "scale=2;a=${_idletime}/${_uptime};if (length(a)==scale(a)) print 0;print a " |bc
+    esac
+}
+
+#7、系统连接数											#返回数值
+function conns(){
+    case $1 in
+    all)
+        netstat -an | grep ESTABLISHED | wc -l
+    ;;
+    [1-9]*)
+        lsof -i:$1 |wc -l
+    esac
+}
+
+#8、系统开启端口数量										#返回任意类型，需要知道是哪些端口
+function ports(){
+    local p
+    case $1 in
+    portList)
+        p="`ss -tnul | grep -v Netid |awk '{print $5}'|awk -F ':' '{print $NF}'|sort -n|uniq`"
+        echo $p
+    ;;
+    port)
+        ss -tnul | grep -v Netid |awk '{print $5}'|awk -F ':' '{print $NF}'|sort -n|uniq|wc -l
+    esac
+}
+
+#9、系统开机启动服务										#返回任意类型
+function services(){
+    local s
+    case $1 in
+    servicesList)
+        s="`ls /etc/systemd/system/multi-user.target.wants/`"
+        echo $s
+    ;;
+    service)
+        ls /etc/systemd/system/multi-user.target.wants/ |wc -l
+    esac
+}
+
+#10、计划任务											#返回文本
+function crontab(){
+    sudo crontab -l -u $1
+}
+