Shell脚本初级练习篇
Shell脚本初级练习篇脚本1
作用：创建10个1M的文件
# cat make_file.sh
#!/bin/bash
#
for i in $(seq 1 10);do
dd if=/dev/zero of=/data/test/test"${i}" bs=1M count=1
done
脚本2
作用：移走/data/test目录下大于100K的普通文件到/tmp目录下
# cat file_mv.sh
#!/bin/bash
#
find /data/test -type f -size +100k | xargs -i mv {} /tmp
脚本3
作用：删除/tmp目录下包含test的任意字符且大小大于100K的文件
# cat file_rm.sh
#!/bin/bash
#
find /tmp -name "test*" -type f -size +100k | xargs -i rm -f {}
脚本4
结合continue，break的for循环示例
# cat for.sh
#!/bin/bash
# for loop egs
for I in {1..10};do
if [[ $I -eq 6 ]];then
echo "six six six"
continue
elif [[ $I -eq 9 ]];then
echo "bye bye 9"
break
fi
echo $I
done
脚本5
简单while循环示例
# cat while.sh
#!/bin/bash
# while loop egs
NUM=5
while [[ $NUM -gt 0 ]];do
echo $NUM
let NUM-=1
done
脚本6
简单until循环示例
# cat until.sh
#!/bin/bash
# until loop egs
#
NUM=5
until [[ $NUM -lt 0 ]];do
echo $NUM
let NUM-=1
done
脚本7
结合位置参数的case语句用法
# cat case.sh
#!/bin/bash
#case loop egs
#
VAR=$1
case $VAR in
neo)
echo hacker
;;
sternberg)
echo rigorous
;;
michael)
echo creative
;;
*)
echo unknow
;;
esac
脚本8
function函数示例
# cat function.sh
#!/bin/bash
#function egs
#
#1st function
function hi() {
echo "Hi,you are beautiful!"
}
#sencond function
hello() {
echo -e "Jun Lei says\"hello thank you\""
}
hi
hello
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