Now, open a closed port and make it listen for TCP connections. For the purposes of this tutorial, you will be opening port4000. However, if that port is not open in your system, feel free to choose another closed port. Just make sure that it’s greater than1023. Ensure that port4000...
The output shows that port 80 has been opened for the HTTP service Open a Port on a Specific Zone To open a port in a specific zone, use the “–zone” option. For instance, the “public” value is assigned to the zone and the “80/tcp” to “add-port”: $ firewall-cmd --per...
sudo firewall-cmd --add-service=http --permanent (允许http服务) sudo firewall-cmd --add-port=8080/tcp --permanent(打开8080端口、如果是mysql就打开3306端口) 注:命令末尾的–permanent表示用久有效,不加这句的话重启后刚才开放的端口就又失效了。 4.最后重启防火墙: sudo firewall-cmd --reload (查看...
Linux 实例启动 SSH 服务,在 secure 日志文件中,或直接返回类似如下错误信息: “error while loading shared libraries: libcrypto.so.10: cannot open shared object file: No such file or directory” “PAM unable to dlopen(/usr/lib64/security/pam_tally.so): /usr/lib64/security/pam_tally.so: canno...
移动到命令最前：按住快捷键 ctrl +a 移动到命令最后：按住快捷键 ctrl+e 5.vi或vim设置或取消行号 ...
一、串口添加权限 sudo chmod777/dev/ttyUSB0 红色部门改成对应的设备 二、USB添加权限 1.枚举usb设备 lsusb 2.查看usb设备节点访问权限 ls /dev/bus/usb/ -lR 3、修改usb设备访问权限使能普通用户操作(重启之后权限自动恢复) sudo chmod666/dev/bus/usb/xxx/yyy ...
/proc/sys/net/ipv4/tcp_fast_open:是否开启TCP Fast Open扩展。该扩展可以提高长距离通信的响应时间。 /proc/sys/net/ipv4/tcp_fin_timeout: 用于控制本端主动关闭后,等待对端FIN包的超时时间,用于避免DOS攻击,单位为秒。 /proc/sys/net/ipv4/tcp_init_cwnd: 初始拥塞窗口大小。可以根据需要,设置较大的值...
redis-cli-hIP-pPORT-h主机ip-p端口号/data# redis-cli -h 10.42.0.80 -p 637910.42.0.2:6379>authredis2023OK10.42.0.2:6379>getmerchantId"37"10.42.0.2:6379>setmerchantId"38" 登录redis集群 /data# redis-cli -c -a redis2023Warning:Usingapasswordwith'-a'or'-u'optiononthecommandlineinterfacemay...
虽然OpenSSH服务器通常无需修改,但会提供其他安全措施,可以在配置文件/etc/ssh/sshd_config中修改OpenSSH服务器的各个方面。 示例: Port 22 # 使用的端口号 PermitRootLogin yes # 是否允许root用户远程登录 X11Forwarding no # 是否允许用户运行远程主机上的X程序 ...
telnet ADDRESS PORT For example: telnet 192.168.3.1 80 To check the HTTP port on the server at IP address 192.168.3.1 If the command returns a failure message, the port is closed – if you get an empty prompt awaiting input, the port is open!