# 1、删除0字节文件

find -type f -size 0 -exec rm -f {} \;

# 2、批量文件重命名

find . -type f -name "*.txt" -exec rename txt sh {} \;

for i in `ls *.sh`;do rename sh txt $i;done

# 3、查看http并发请求数及其TCP连接状态

netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'

# 4、文件内容批量替换

sed -i '/Root/s/no/yes/' /etc/ssh/sshd_config

# 5、编写shell中显示多条信息

cat << EOF

+--------------------------------------------------------------+

|         === Welcome to Tunoff services ===                   |

+--------------------------------------------------------------+

EOF

# 6、获取IP地址

awk

sed

cut tr

# 7、批量新建用户并设置随机密码

# 8. 清除所有arp缓存

arp -n|awk '/^[1-9]/ {print "arp -d "$1}'|sh

# 9. 绑定已知机器的arp地址

cat /proc/net/arp | awk '{print $1 " " $4}' |sort -t. -n +3 -4 > /etc/ethers