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![Shell Script Tomcat 状态监视脚本
#!/bin/sh
while test true ;do
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
else
echo "tomcat is running"
fi
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-2-2048.jpg)
![Shell Script
语法简介
变量赋值
VAR1=message
echo $VAR1
if 语句
if [ -d /home/apple ]; do
rm -rf /home/apple
fi](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-21-2048.jpg)
![Shell Script
语法简介
for 语句
for i in 1 2 3 4; do
echo $(($i * 2))
done
while 语句
while [ 1 ]; then
echo I am working...
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-22-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/sh
while test true ;do
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
else
echo "tomcat is running"
fi
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-25-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/sh
至少 4 处不妥当的地方
while test true ;do
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
else
echo "tomcat is running"
fi
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-26-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/sh
while test true ;do
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
ui=pgrep tomcat
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
else
echo "tomcat is running"
fi
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-27-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/sh
while test true ;do 死循环，耗资源
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
ui=pgrep tomcat
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
else
echo "tomcat is running"
fi
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-28-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/sh
while test true ;do 死循环，耗资源
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
ui=pgrep tomcat
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
没有判断是否启动成功
else
echo "tomcat is running"
fi
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-29-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/sh
while test true ;do 死循环，耗资源
ui=$(ps x | egrep tomcat | grep -v grep |
awk '{print $1}')
ui=pgrep tomcat
if [ "$ui" == "" ] ;then
/opt/unimas/tomcatui/bin/startup.sh
sleep 4
没有判断是否启动成功
else
echo "tomcat is running"
fi
仅通过进程号判断 tomcat 状态不合理
done](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-30-2048.jpg)
![Shell Script Tomcat 状态监视脚本
#!/bin/bash
ALIVE_URL=http://127.0.0.1:8080/alive.html
ALIVE=$(w3m -dump $ALIVE_URL)
if [ ! “$ALIVE” == “alive” ]; do
mail -s "alert-error" hellojinjie@gmail.com
<<< “tomcat error, restarting tomcat”
/opt/bin/tomcat restart
if [ ! “$?” == “0” ]; then
mail -s "alert-fatal" hellojinjie@gmail.com
<<< “error ocurred while restarting tomcat”
fi
fi crontab
*/5 * * * * /path/to/tomcat_monitor.sh](https://image.slidesharecdn.com/shellscript-111029085511-phpapp01/75/shell-script-introduction-31-2048.jpg)
Uploaded byJie Jin
shell script introduction
本文档介绍了多个 Shell 脚本示例，包括监控 Tomcat 状态、下载必应背景图片以及基本的 Shell 语法和实用工具。它强调了 Shell 脚本在监控应用程序、自动化构建和开发任务中的应用。还包括一些基础的输入输出处理及常用命令的介绍。
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shell script introduction
- 1. The Unix andGNU/Linux Command Line Shell Script 2011 10.28
- 2. Shell Script Tomcat 状态监视脚本 #!/bin/sh while test true ;do ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 else echo "tomcat is running" fi done
- 3. Shell Script Shell Script 可以用来做什么？ 监控应用程序的运行
- 4. Shell Script Borealis 构建脚本 #!/bin/bash export CVS_SANDBOX=$HOME/Workspace/borealis export BOREALIS_HOME=$CVS_SANDBOX/polaris source $BOREALIS_TOOL/rc case "x$1" in "x" | "xhelp" ) echo -e $HELP_TEXT ;; "xinit" ) echo "try source build.sh" ;; "xall" ) cd utility/unix/ ./build.borealis.sh ./build.borealis.sh -client -tool.marshal -tool.head cd - ;; * ) echo "Unknow option: "$1" ;; esac
- 5. Shell Script Autotools 辅助脚本 #!/bin/sh if test ! -f configure.ac; then echo Setup must be run from the source directory >&2 exit 1 fi rm -rf config mkdir config rm -rf autom4te.cache configure config.status aclocal.m4 Makefile.in aclocal libtoolize autoheader touch NEWS README AUTHORS ChangeLog automake --add-missing autoconf if test -f config.status; then sh config.status fi
- 6. Shell Script Shell Script 可以用来做什么？ 监控应用程序的运行 一键构建脚本，辅助开发，完成繁琐的操作步骤
- 7. Shell Script 抓取必应背景图片并设为桌面 #!/bin/bash DOWN_DIR=$(pwd) # 下载图片的目录 DOWN_URL="http://cn.bing.com" cd $DOWN_DIR # cd 到下载图片的目录去 rm -f /tmp/bing wget -O /tmp/bing $DOWN_URL jpg_url=$(cat /tmp/bing | grep -oi 'g_img={url:.*jpg' | grep -o '/.*jpg' | sed -e 's///g') down_jpg_url=http://www.bing.com$jpg_url wget -nc $down_jpg_url gconftool-2 -t str –set /desktop/gnome/background/picture_filename $(pwd)/$(echo $jpg_url | awk -F "/" '{print $4}') cd - # cd 回到原来的目录
- 8. Shell Script Shell Script 可以用来做什么？ 监控应用程序的运行 一键构建脚本，辅助开发，完成繁琐的操作步骤 自己写些好玩的程序，帮助完成工作
- 9. Shell Script Shell Script 可以用来做什么？ 监控应用程序的运行 一键构建脚本，辅助开发，完成繁琐的操作步骤 自己写些好玩的程序，帮助完成工作 很多很多其他的应用
- 10. Shell Script 几个简单的例子 ( 前面四个例子 ) Shell Script 基础 输入 / 输出流 Shell Script 语法简介
- 11. Shell Script Shell Script 基础 Linux 有很多的实用小工具，每个小工具只做一件事 Linux 大部分的配置文件都是以文本格式保存的 了解系统提供的实用小程序 熟悉文本处理工具
- 12. Shell Script 了解系统提供的实用小程序 cat cd chmod chown chgrp cp du df fsck ln ls mkdir mount mv pwd rm touch kill ps sleep time top awk cut head less more sed sort tail tr uniq wc xargs alias basename dirname echo expr false printf test true unset
- 13. Shell Script 了解系统提供的实用小程序 find grep locate whereis which netstat ping netcat traceroute ssh wget bc cal clear date dd file help info size man history tee type yes uname whatis
- 14. Shell Script 了解系统提供的实用小程序 find grep locate whereis which netstat ping netcat traceroute ssh wget bc cal clear date dd file help info size man history tee type yes uname whatis Shell Script 更多的是一种胶水语言 (glue language)
- 15. Shell Script 熟悉文本处理工具 cat grep sed awk tail head wc sort 正则表达式
- 16. Shell Script 几个简单的例子 ( 前面四个例子 ) Shell Script 基础 输入 / 输出流 Shell Script 语法简介
- 17. Shell Script 输入 / 输出流 STDIN 0 $ bc <<< 1+1 STDOUT 1 $ echo hello STDERR 2 $ echo error message 1>&2
- 18. Shell Script 输入 / 输出流 IO Redirection $ echo error message 1>&2 $ echo hello > onefile.txt $ echo hello >> onefile.txt Pipeline $ echo hello | grep ll
- 19. Shell Script 一个例子 jpg_url=$( cat /tmp/bing | grep -oi 'g_img={url:.*jpg' | grep -o '/.*jpg' | sed -e 's///g' )
- 20. Shell Script 几个简单的例子 ( 前面四个例子 ) Shell Script 基础 输入 / 输出流 Shell Script 语法简介
- 21. Shell Script 语法简介 变量赋值 VAR1=message echo $VAR1 if 语句 if [ -d /home/apple ]; do rm -rf /home/apple fi
- 22. Shell Script 语法简介 for 语句 for i in 1 2 3 4; do echo $(($i * 2)) done while 语句 while [ 1 ]; then echo I am working... done
- 23. Shell Script 语法简介 case 语句 case "$i" in "1" | "2") echo 1 ;; * ) echo unknow... ;; esac
- 24. Shell Script 语法简介 函数的定义与使用 foo() { echo $1 echo $1 } foo message
- 25. Shell Script Tomcat 状态监视脚本 #!/bin/sh while test true ;do ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 else echo "tomcat is running" fi done
- 26. Shell Script Tomcat 状态监视脚本 #!/bin/sh 至少 4 处不妥当的地方 while test true ;do ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 else echo "tomcat is running" fi done
- 27. Shell Script Tomcat 状态监视脚本 #!/bin/sh while test true ;do ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') ui=pgrep tomcat if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 else echo "tomcat is running" fi done
- 28. Shell Script Tomcat 状态监视脚本 #!/bin/sh while test true ;do 死循环，耗资源 ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') ui=pgrep tomcat if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 else echo "tomcat is running" fi done
- 29. Shell Script Tomcat 状态监视脚本 #!/bin/sh while test true ;do 死循环，耗资源 ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') ui=pgrep tomcat if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 没有判断是否启动成功 else echo "tomcat is running" fi done
- 30. Shell Script Tomcat 状态监视脚本 #!/bin/sh while test true ;do 死循环，耗资源 ui=$(ps x | egrep tomcat | grep -v grep | awk '{print $1}') ui=pgrep tomcat if [ "$ui" == "" ] ;then /opt/unimas/tomcatui/bin/startup.sh sleep 4 没有判断是否启动成功 else echo "tomcat is running" fi 仅通过进程号判断 tomcat 状态不合理 done
- 31. Shell Script Tomcat 状态监视脚本 #!/bin/bash ALIVE_URL=http://127.0.0.1:8080/alive.html ALIVE=$(w3m -dump $ALIVE_URL) if [ ! “$ALIVE” == “alive” ]; do mail -s "alert-error" hellojinjie@gmail.com <<< “tomcat error, restarting tomcat” /opt/bin/tomcat restart if [ ! “$?” == “0” ]; then mail -s "alert-fatal" hellojinjie@gmail.com <<< “error ocurred while restarting tomcat” fi fi crontab */5 * * * * /path/to/tomcat_monitor.sh
- 32. Shell Script 更多的 ...... Shell Script 有很多的语法细节 如何编写跨平台的脚本， unix,bsd,linux sh,tcsh, bash, dash, ksh, csh sed & awk .bashrc & .bash_profile Errors and Signals (Traps) man & info
- 33. Shell Script 经典教程 Advanced Bash-Scripting Guide
- 34. Shell Script Q&A