==============常用命令
env
echo $path
export
-------------
cp
mv
mkdir
rm
-------------
cd
ls
ll
-------------
more
cat
tail
vi
-------------
ifconfig
getconf LONG_BIT
df -h
==============shell语法
#!/bin/
bash
#test1
echo "Hello shell"
echo `who`
echo "who"
-----------------------
#!/bin/
bash
#t2
echo "test 2"
var1=
1
var2=
2
let var3=$var2+
$var1
echo $var3
echo "end!"
-----------------------
#!/bin/
bash
#t3
echo "test 3"
echo "input first integer please:"
read var1
echo "input second integer please:"
read var2
let var3=var2+
var1
echo $var1+$var2=
$var3
echo "end!"
-----------------------
#!/bin/
bash
#t4
echo "test 4"
var1=$
1
if [ $var1 -lt
0 ]
then
echo "illegal!"
fi
echo "end!"
-----------------------
#!/bin/
bash
#t5
echo "test 5"
var1=$
1
if [ $var1 -lt
0 ]
then
echo "illegal!"
else
echo "Yeah!"
fi
echo "end!"
-----------------------
#!/bin/
bash
#t6
echo "test 6"
var1=$
1
if [ $var1 -lt
0 ]
then
echo "illegal!"
elif [ $var1 -lt
60 ]
then
echo "fail!"
else
echo "Yeah!"
fi
echo "end!"
-----------------------
#!/bin/
bash
sum=
0
for ((i=
1;i<
101;i++
))
{
let "sum+=i"
}
echo "sum=$sum"
-----------------------
#!/bin/
bash
for animal
in cat dog pig duck mice
do
echo $animal
done
-----------------------
#!/bin/
bash
sum=
0
echo "input your number:"
read num
while(($num>
0))
do
let "sum+=num"
let "num--"
done
echo "sum=$sum"
转载于:https://www.cnblogs.com/SeaSky0606/p/4663776.html
