MAC刷新DNS缓存
sudo killall -HUP mDNSResponder
MAC – 验证SHA-256
openssl dgst -sha256 /path/to/file
MAC – 验证SHA-1
openssl sha1 /path/to/file
MAC – 验证 MD5
openssl md5 /path/to/file
查看本地缓存ARP列表
arp -a
Maven依赖树
mvn dependency:tree
iptables防火墙
sudo /sbin/iptables -I INPUT -p tcp –dport 3260 -j ACCEPT
sudo /sbin/iptables -I INPUT -s 19.168.0.0/24 -p tcp –dport 3260 -j ACCEPT
sudo /sbin/iptables -I INPUT -s 127.0.0.1 -p tcp –dport 3260 -j ACCEPT
sudo iptables –list
哪些被删，但是还占着地方的文件了
lsof |grep deleted |grep -v php-cgi
查看Linux版本
more /etc/issue
lsb_release -a
cat /etc/redhat-release
rpm -q redhat-release
初始化/挂载磁盘
fdisk -l
fdisk /dev/xvdb
mkfs -t ext4 /dev/xvdb1
mkdir /home/data
mount /dev/xvdb1 /home/data
vim /etc/fstab
/dev/xvdb1 /home/data ext4 defaults 1 2