删除shell函数：命令格式：unsrt function_name
创建函数：例
function func2 { echo fun2;}
fork 炸弹；:(){ :|&};:
脚本：
cat Bomb.sh
#!/bin/bash
./$0./$0&
信号捕捉
trap ‘ehcho trap 15’ 15
for ((i=0: i<=100:i++)):do
echo $i
sleep 0.5
done
创建格子脚本
vim chess.sh
for i in {1..8};do
for j in {1..4};do
if [$[i%2] -eq o ] ; then
echo -e “\033[1;42m \033 [0m\033[1;45 \033[0m\c”
else
echo -e “\033[1;45m \033 [0m\033[1;42 \033[0m\c”
fi
done
echo
done
生成随机字符；openssl rand -base64
99乘法 脚本；
for i in {1..9} ;do
for j in `seq 1 $i `;do
result=$[$j * $i]
echo -e “s{j} x $ {i}=$result\c”
done
echo
done
扫描 IP vim scanip.shnet=某ip地址
for i in {1..254};do
{if ping -cl -wl |sum; $i &> /dev/null;then
echo $net . $i is up
else
echo $net.$i is down
fi;}
done
wait
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