mirror of
https://github.com/JamesonHuang/OpenWrt_Luci_Lua.git
synced 2024-11-30 16:33:01 +00:00
136 lines
2.6 KiB
Bash
136 lines
2.6 KiB
Bash
#!/bin/bash
|
||
#以下代码中(())可替换为[]
|
||
|
||
|
||
#--------------------------------------
|
||
echo "var define"
|
||
|
||
var="helo" #定义变量不需加$
|
||
echo ${var} #使用变量时加$
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "echo about str"
|
||
|
||
#单引号中任何字符均原样输出
|
||
#单引号里不能出现单引号（使用转义符也不行）
|
||
single_str='helo'
|
||
|
||
#双引号里可以有变量
|
||
#双引号里可以出现转义字符
|
||
double_str="hello,\" ${single_str} \" "
|
||
echo $single_str
|
||
echo $double_str
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "字符串连接："
|
||
#字符串连接
|
||
#method 1
|
||
echo "method1: ","helo", "helo"
|
||
|
||
#method 2
|
||
str="strcat"
|
||
str2="helo"
|
||
echo "method2: ${str},${str2}"
|
||
|
||
#method 3
|
||
echo "method3:" ${str} ${str2}
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "get strlen:"
|
||
echo "strlen: ", "${#str}"
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "substr:"
|
||
substr="hello Meizu!"
|
||
echo ${substr:1:4}
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
|
||
#--------------------------------------
|
||
echo "查找子串: error"
|
||
echo 'expr Meizu "${substr}"'
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "for sh format:"
|
||
|
||
for((i=0; i<10; i++)) do
|
||
echo $i
|
||
done
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "if-else:"
|
||
min=10
|
||
max=10
|
||
if ((${min} < ${max})); then
|
||
echo "min < max"
|
||
elif ((${min} > ${max})); then
|
||
echo "min > max"
|
||
else
|
||
echo "min = max"
|
||
fi
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "while"
|
||
var=10
|
||
while ((${var} > 0)); do
|
||
var=$((var-1))
|
||
echo $var
|
||
done
|
||
echo "----------------------;-----"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "执行shell命令，将结果赋给变量:"
|
||
#var=`date`
|
||
var=$(date)
|
||
echo $var
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo "echo不换行:"
|
||
# -e 开启转义 \c 不换行
|
||
echo -e "OK! \c oo"
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo -e "前台运行shell:\t\c"
|
||
ls
|
||
echo "后台运行shell："
|
||
ls &
|
||
echo "---------------------------"
|
||
echo ""
|
||
#--------------------------------------
|
||
echo "/dev/null:"
|
||
echo "helo" > /dev/null
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo '$?:'
|
||
ls
|
||
echo $?
|
||
echo "---------------------------"
|
||
echo ""
|
||
|
||
#--------------------------------------
|
||
echo HELLO'X'
|
||
echo "---------------------------"
|
||
echo ""
|