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摘要： Performance vs. load vs. stress testingHere's a good interview question for a tester: how do you define performance/load/stress testing? Many times people use these terms interchangeably, but they have in fact quite different meanings. This post is a quick review of these concepts, based on 阅读全文

摘要： test命令用法。功能：检查文件和比较值1）判断表达式iftest(表达式为真)iftest!表达式为假test表达式1–a表达式2两个表达式都为真test表达式1–o表达式2两个表达式有一个为真2）判断字符串test–n字符串字符串的长度非零test–z字符串字符串的长度为零test字符串1＝字符串2字符串相等test字符串1！＝字符串2字符串不等3）判断整数test整数1–eq整数2整数相等test整数1–ge整数2整数1大于等于整数2test整数1–gt整数2整数1大于整数2test整数1–le整数2整数1小于等于整数2test整数1–lt整数2整数1小于整数2test整数1–ne整数2 阅读全文

摘要： linux中shell变量$#,$@,$0,$1,$2的含义解释:变量说明:$$Shell本身的PID（ProcessID）$!Shell最后运行的后台Process的PID$?最后运行的命令的结束代码（返回值）$-使用Set命令设定的Flag一览$*所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。$@所有参数列表。如"$@"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。$#添加到 阅读全文

摘要： The basename utility is used toRemove any prefix ending in /.Remove the suffix from a string.Syntax of basename command:basename [string] [suffix]Here 'string' is theinput string and suffixis the stringwhich needs to removed from the input string.Examples:1.basename /usr/bin/perlscriptThis w 阅读全文

摘要： From:http://www.davidpashley.com/articles/writing-robust-shell-scripts.htmlMany people hack together shell scripts quickly to do simple tasks, but these soon take on a life of their own. Unfortunately shell scripts are full of subtle effects which result in scripts failing in unusual ways. It's 阅读全文

摘要： linux中shell变量$#,$@,$0,$1,$2的含义解释:变量说明:$$Shell本身的PID（ProcessID）$!Shell最后运行的后台Process的PID$?最后运行的命令的结束代码（返回值）$-使用Set命令设定的Flag一览$*所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。$@所有参数列表。如"$@"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。$#添加到 阅读全文