Linux:shell命令
Linux：shell命令
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Shell echo命令
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显示普通字符串
echo "i am wsf" -
显示转义字符
echo "i\" am usf" -
显示变量
read name#相当于python中的input echo "${name} is a name"read -p "请输入您的名字：" names#提示 echo "${names} is a names" -
显示换行
echo -e "i am fine \n" echo " irt is finr" -
显示不换行
echo -e "ok \c" echo "i am fine" -
显示结果定向至文件
echo "i am ok" > myfile -
原样输出字符串，不进行转义或取变量(用单引号)
echo '$name\"' -
显示命令执行结果
echo `date`
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Shell read命令
read a b c #使用空格分开 echo $a $b $cread -p "请输入您的年龄" age echo "您的年龄是：${age}"read -p "请输入您的年龄" -t 3 age echo echo "您的年龄是：${age}"read -p "请输入您的年龄" -s -t 5 age echo echo "您的年龄是：${age}" -
Shell printf命令
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Shell test命令
a=5 b=3 if test $a = $b; thenecho "两数相等" elseecho "两数不相等" fiif test -z $a; then echo "字符串长度为0" elseecho "字符串长度不为0" fi
if test -e ./demo.sh; then echo "存在" elseecho "不存在" fiif test -w ./demo.sh; then echo "存在且可读" elseecho "不存在或不可读" fi
