Shell目录结构、访问量

一、在Linux中使用Shell写一个显示目录结构的命令，快速寻找目录结构。

1、代码

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#!/usr/bin/env bash # 本命令用于显示指定路径或者当前路径的文件结构，支持搜索 # tf 显示当前目录的文件结构 # tf 接关键词  搜索当前目录 # tf 目录 关键词 搜索指定目录   # 本命令依赖于 tree 命令 DIR= KEYWORD=   # 不传路径 默认为搜索 if [ $# -eq 1 ]; then   KEYWORD=$1 fi   # 指定路径搜索 if [ $# -eq 2 ]; then   DIR=$1   KEYWORD=$2 fi   if [ -n "$DIR" ]; then    cd "$DIR" || exit 1 fi   pwd   tree -C -f | grep "$KEYWORD"

2、使用效果

当前路径 tf

搜索

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tf 关键词   // 比如 tf lib

指定搜索某个路径

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1	tf /usr/local/ lib

3、颜色意思

• 蓝色代表目录
• 绿色代表可执行文件
• 红色代表压缩文件
• 浅蓝色代表链接文件
• 灰色代表其他文件
• 红色闪烁代表链接文件有问题
• 黄色代表设备文件
• 白色代表一般性文件，如：文本文件、配置文件、源码文件等

4、find方式

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1	find  .  *

5、$ sudo  ls  -Rlr  workspace/

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workspace/consul/data/raft/snapshots/4-1530344-1620209203832: 总用量 84 -rw-r--r-- 1 100 op_admin 81373 5月   5 18:06 state.bin -rw-r--r-- 1 100 op_admin   278 5月   5 18:06 meta.json   workspace/consul/data/checks: 总用量 12 -rw------- 1 100 op_admin 618 4月  30 15:42 de32072ff4739beff1ae06738a11671f -rw------- 1 100 op_admin 643 4月  30 15:42 848be890d57dbf76f68981c9b108eac7 -rw------- 1 100 op_admin 647 4月  30 15:18 1da1efd08f1cba532d04e97482713e9e

二、服务器ip访问量筛选

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$ cat ip.sh #!/bin/bash shuchu() {         echo     echo "$(date +%F/%H/%M/%S) 访问："     echo "整体访问数：$(netstat -anptu | wc -l)"     a=`netstat -anptu |  awk  '{print $5}' | awk -F':' '{print $1}' | sort |uniq | wc -l`         echo "整体IP数：${a}" } if [[ "$1" == "shu" ]];then     shuchu &>> /tmp/wiki-fangwen.log else     shuchu fi   $ sudo  bash ip.sh 2021-05-05/18/28/18 访问： 整体访问数：329 整体IP数：24

三、服务器性能测试（变量、输出色调设计值得学习）

原创https://i.cnblogs.com/posts/edit;postId=14125534

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#!/usr/bin/env bash # URL: https://teddysun.com/444.html   trap _exit INT QUIT TERM   _red() {     printf '\033[0;31;31m%b\033[0m' "$1" }   _green() {     printf '\033[0;31;32m%b\033[0m' "$1" }   _yellow() {     printf '\033[0;31;33m%b\033[0m' "$1" }   _blue() {     printf '\033[0;31;36m%b\033[0m' "$1" }   _exists() {     local cmd="$1"     if eval type type > /dev/null 2>&1; then         eval type "$cmd" > /dev/null 2>&1     elif command > /dev/null 2>&1; then         command -v "$cmd" > /dev/null 2>&1     else         which "$cmd" > /dev/null 2>&1     fi     local rt=$?     return ${rt} }   _64bit(){     if [ $(getconf WORD_BIT) = '32' ] && [ $(getconf LONG_BIT) = '64' ]; then         return 0     else         return 1     fi }   _exit() {     _red "\nThe script has been terminated.\n"     # clean up     rm -fr speedtest.tgz speedtest-cli benchtest_*     exit 1 }   get_opsy() {     [ -f /etc/redhat-release ] && awk '{print $0}' /etc/redhat-release && return     [ -f /etc/os-release ] && awk -F'[= "]' '/PRETTY_NAME/{print $3,$4,$5}' /etc/os-release && return     [ -f /etc/lsb-release ] && awk -F'[="]+' '/DESCRIPTION/{print $2}' /etc/lsb-release && return }   next() {     printf "%-70s\n" "-" | sed 's/\s/-/g' }   speed_test() {     local nodeName="$2"     [ -z "$1" ] && ./speedtest-cli/speedtest --progress=no --accept-license --accept-gdpr > ./speedtest-cli/speedtest.log 2>&1 || \     ./speedtest-cli/speedtest --progress=no --server-id=$1 --accept-license --accept-gdpr > ./speedtest-cli/speedtest.log 2>&1     if [ $? -eq 0 ]; then         local dl_speed=$(awk '/Download/{print $3" "$4}' ./speedtest-cli/speedtest.log)         local up_speed=$(awk '/Upload/{print $3" "$4}' ./speedtest-cli/speedtest.log)         local latency=$(awk '/Latency/{print $2" "$3}' ./speedtest-cli/speedtest.log)         if [[ -n "${dl_speed}" && -n "${up_speed}" && -n "${latency}" ]]; then             printf "\033[0;33m%-18s\033[0;32m%-18s\033[0;31m%-20s\033[0;36m%-12s\033[0m\n" " ${nodeName}" "${up_speed}" "${dl_speed}" "${latency}"         fi     fi }   speed() {     speed_test '' 'Speedtest.net'     speed_test '5145'  'Beijing    CU'     speed_test '3633'  'Shanghai   CT'     speed_test '24447' 'Shanghai   CU'     speed_test '27594' 'Guangzhou  CT'     speed_test '26678' 'Guangzhou  CU'     speed_test '16192' 'Shenzhen   CU'     speed_test '4515'  'Shenzhen   CM'     speed_test '32155' 'Hongkong   CN'     speed_test '13623' 'Singapore  SG'     speed_test '15047' 'Tokyo      JP' }   io_test() {     (LANG=C dd if=/dev/zero of=benchtest_$$ bs=64k count=16k conv=fdatasync && rm -f benchtest_$$ ) 2>&1 | awk -F, '{io=$NF} END { print io}' | sed 's/^[ \t]*//;s/[ \t]*$//' }   calc_disk() {     local total_size=0     local array=$@     for size in ${array[@]}     do         [ "${size}" == "0" ] && size_t=0 || size_t=`echo ${size:0:${#size}-1}`         [ "`echo ${size:(-1)}`" == "K" ] && size=0         [ "`echo ${size:(-1)}`" == "M" ] && size=$( awk 'BEGIN{printf "%.1f", '$size_t' / 1024}' )         [ "`echo ${size:(-1)}`" == "T" ] && size=$( awk 'BEGIN{printf "%.1f", '$size_t' * 1024}' )         [ "`echo ${size:(-1)}`" == "G" ] && size=${size_t}         total_size=$( awk 'BEGIN{printf "%.1f", '$total_size' + '$size'}' )     done     echo ${total_size} }   check_virt(){     _exists "dmesg" && virtualx="$(dmesg 2>/dev/null)"     if _exists "dmidecode"; then         sys_manu="$(dmidecode -s system-manufacturer 2>/dev/null)"         sys_product="$(dmidecode -s system-product-name 2>/dev/null)"         sys_ver="$(dmidecode -s system-version 2>/dev/null)"     else         sys_manu=""         sys_product=""         sys_ver=""     fi     if   grep -qa docker /proc/1/cgroup; then         virt="Docker"     elif grep -qa lxc /proc/1/cgroup; then         virt="LXC"     elif grep -qa container=lxc /proc/1/environ; then         virt="LXC"     elif [[ -f /proc/user_beancounters ]]; then         virt="OpenVZ"     elif [[ "${virtualx}" == *kvm-clock* ]]; then         virt="KVM"     elif [[ "${cname}" == *KVM* ]]; then         virt="KVM"     elif [[ "${cname}" == *QEMU* ]]; then         virt="KVM"     elif [[ "${virtualx}" == *"VMware Virtual Platform"* ]]; then         virt="VMware"     elif [[ "${virtualx}" == *"Parallels Software International"* ]]; then         virt="Parallels"     elif [[ "${virtualx}" == *VirtualBox* ]]; then         virt="VirtualBox"     elif [[ -e /proc/xen ]]; then         virt="Xen"     elif [[ "${sys_manu}" == *"Microsoft Corporation"* ]]; then         if [[ "${sys_product}" == *"Virtual Machine"* ]]; then             if [[ "${sys_ver}" == *"7.0"* || "${sys_ver}" == *"Hyper-V" ]]; then                 virt="Hyper-V"             else                 virt="Microsoft Virtual Machine"             fi         fi     else         virt="Dedicated"     fi }   ipv4_info() {     local org="$(wget -q -T10 -O- ipinfo.io/org)"     local city="$(wget -q -T10 -O- ipinfo.io/city)"     local country="$(wget -q -T10 -O- ipinfo.io/country)"     local region="$(wget -q -T10 -O- ipinfo.io/region)"     [[ -n "$org" ]] && echo " Organization          : $(_blue "$org")"     [[ -n "$city" && -n "country" ]] && echo " Location              : $(_blue "$city / $country")"     [[ -n "$region" ]] && echo " Region                : $(_blue "$region")" }   install_speedtest() {     if  [ ! -e "./speedtest-cli/speedtest" ]; then         _64bit && sys_bit=x86_64 || sys_bit=i386         url1="https://dl.bintray.com/ookla/download/ookla-speedtest-1.0.0-${sys_bit}-linux.tgz"         url2="https://dl.lamp.sh/files/ookla-speedtest-1.0.0-${sys_bit}-linux.tgz"         wget --no-check-certificate -q -T10 -O speedtest.tgz ${url1}         if [ $? -ne 0 ]; then             wget --no-check-certificate -q -T10 -O speedtest.tgz ${url2}             [ $? -ne 0 ] && _red "Error: Failed to download speedtest-cli.\n" && exit 1         fi         mkdir -p speedtest-cli && tar zxf speedtest.tgz -C ./speedtest-cli && chmod +x ./speedtest-cli/speedtest         rm -f speedtest.tgz     fi }   ! _exists "wget" && _red "Error: wget command not found. You must be install wget command at first.\n" && exit 1 # Get System information cname=$( awk -F: '/model name/ {name=$2} END {print name}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' ) cores=$( awk -F: '/model name/ {core++} END {print core}' /proc/cpuinfo ) freq=$( awk -F'[ :]' '/cpu MHz/ {print $4;exit}' /proc/cpuinfo ) ccache=$( awk -F: '/cache size/ {cache=$2} END {print cache}' /proc/cpuinfo | sed 's/^[ \t]*//;s/[ \t]*$//' ) tram=$( LANG=C; free -m | awk '/Mem/ {print $2}' ) uram=$( LANG=C; free -m | awk '/Mem/ {print $3}' ) swap=$( LANG=C; free -m | awk '/Swap/ {print $2}' ) uswap=$( LANG=C; free -m | awk '/Swap/ {print $3}' ) up=$( awk '{a=$1/86400;b=($1%86400)/3600;c=($1%3600)/60} {printf("%d days, %d hour %d min\n",a,b,c)}' /proc/uptime ) if _exists "w"; then     load=$( LANG=C; w | head -1 | awk -F'load average:' '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//' ) elif _exists "uptime"; then     load=$( LANG=C; uptime | head -1 | awk -F'load average:' '{print $2}' | sed 's/^[ \t]*//;s/[ \t]*$//' ) fi opsy=$( get_opsy ) arch=$( uname -m ) if _exists "getconf"; then     lbit=$( getconf LONG_BIT ) else     echo ${arch} | grep -q "64" && lbit="64" || lbit="32" fi kern=$( uname -r ) disk_size1=($( LANG=C df -hPl | grep -wvE '\-|none|tmpfs|devtmpfs|by-uuid|chroot|Filesystem|udev|docker' | awk '{print $2}' )) disk_size2=($( LANG=C df -hPl | grep -wvE '\-|none|tmpfs|devtmpfs|by-uuid|chroot|Filesystem|udev|docker' | awk '{print $3}' )) disk_total_size=$( calc_disk "${disk_size1[@]}" ) disk_used_size=$( calc_disk "${disk_size2[@]}" ) tcpctrl=$( sysctl net.ipv4.tcp_congestion_control | awk -F ' ' '{print $3}' ) check_virt clear next echo " CPU Model             : $(_blue "$cname")" echo " CPU Cores             : $(_blue "$cores")" echo " CPU Frequency         : $(_blue "$freq MHz")" echo " CPU Cache             : $(_blue "$ccache")" echo " Total Disk            : $(_blue "$disk_total_size GB ($disk_used_size GB Used)")" echo " Total Mem             : $(_blue "$tram MB ($uram MB Used)")" echo " Total Swap            : $(_blue "$swap MB ($uswap MB Used)")" echo " System uptime         : $(_blue "$up")" echo " Load average          : $(_blue "$load")" echo " OS                    : $(_blue "$opsy")" echo " Arch                  : $(_blue "$arch ($lbit Bit)")" echo " Kernel                : $(_blue "$kern")" echo " TCP CC                : $(_blue "$tcpctrl")" echo " Virtualization        : $(_blue "$virt")" ipv4_info next io1=$( io_test ) echo " I/O Speed(1st run)    : $(_yellow "$io1")" io2=$( io_test ) echo " I/O Speed(2nd run)    : $(_yellow "$io2")" io3=$( io_test ) echo " I/O Speed(3rd run)    : $(_yellow "$io3")" ioraw1=$( echo $io1 | awk 'NR==1 {print $1}' ) [ "`echo $io1 | awk 'NR==1 {print $2}'`" == "GB/s" ] && ioraw1=$( awk 'BEGIN{print '$ioraw1' * 1024}' ) ioraw2=$( echo $io2 | awk 'NR==1 {print $1}' ) [ "`echo $io2 | awk 'NR==1 {print $2}'`" == "GB/s" ] && ioraw2=$( awk 'BEGIN{print '$ioraw2' * 1024}' ) ioraw3=$( echo $io3 | awk 'NR==1 {print $1}' ) [ "`echo $io3 | awk 'NR==1 {print $2}'`" == "GB/s" ] && ioraw3=$( awk 'BEGIN{print '$ioraw3' * 1024}' ) ioall=$( awk 'BEGIN{print '$ioraw1' + '$ioraw2' + '$ioraw3'}' ) ioavg=$( awk 'BEGIN{printf "%.1f", '$ioall' / 3}' ) echo -e " Average I/O speed     : $(_yellow "$ioavg MB/s")" next install_speedtest && printf "%-18s%-18s%-20s%-12s\n" " Node Name" "Upload Speed" "Download Speed" "Latency" speed && rm -fr speedtest-cli next

四、防止ddos攻击

1.对于多次的网段进行封禁
2.加入定时任务，定期检查

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#!/bin/bash #获取多次重复的网段 netstat -anptu |awk '{print $5}' |awk -F':' '{print $1}' | sort | uniq |awk -F'.' '{print $1"."$2}' |sort |uniq -c > /baota-ip.txt #先都解封了 while read line do     iptables -D INPUT -p tcp -m state --state NEW  -m tcp -s ${line} --dport 80 -j DROP done < /error-ip.txt #再筛选加入 while read line do     #number是重复的次数，network是要封闭的网段     number=`echo $line |awk '{print $1}'`     ip=`echo $line |awk '{print $2}'`     network="${ip}.0.0/16"     > /error-ip.txt     #如果这个网段重复超过N次，则封禁     if [[ $number -ge 12 ]];then          echo $number >> /error-ip.txt          iptables -I INPUT -p tcp -m state --state NEW  -m tcp -s ${number} --dport 80 -j DROP     fi done < /baota-ip.txt