t420 ports

One, view the ports that are occupied by all processesAt the start-run-cmd, enter: Netstat–ano to view all processesSecond, view the program that occupies the specified portWhen you are using Tomcat to publish a program, you often encounter the port is occupied, we want to know which program or process occupies the port, you can use the command netstat–ano|findstr "specify port number" two, to see the program that occupies the specified

1. Netstat-ano Show all ports corresponding to PID in Task Manager, open Task Manager to query occupation process through PIDAppendix: On the command line, enter netstat/? You can view information about the netstat.C:\Documents and Settings\administrator>netstat/?Displays protocol statistics and current TCP/IP network connections.NETSTAT [-A] [-b] [-e] [-n] [-O] [-P proto] [-r] [-S] [-t] [-v] [interval]-a displays all connections and listening ports.T

As the company's application demand increases, the number of servers is also increasing. as the number of servers increases, we will find that a puppetmaster is under great pressure and resolution is slow, in addition, there may be errors such as "timeout" from time to time. Is there any optimization method? We found a solution on the official Puppet website. we found that puppetmaster can configure multiple ports and combine them with WEB proxy (Ngin

Usually ssh telnet to the default port is 22, this port is generally can be changed or added, the configuration file location in:/etc/ssh/sshd_config by editing the file can modify the SSHD service related configuration, the following new Port 2223, That is, in addition to 22 port can log on to the server outside 2223 can also log inExecute command vim/etc/ssh/sshd_config Edit configuration file　　You can see that the default port is 22 and comment, then remove the comment and add a new line to P

1. Connect Mycat 9066 Management portCommand: mysql-uroot-proot-p9066-h127.0.0.1-U: User name-P: Password-P: Port-h:ip Address Example: TheLinux path switches to the bin directory of the Mycat installation path : Enter commandThis indicates that the login was successful.2, display the back-end physical library connection information, including the current number of connections, ports and other information.Command: Show @ @backend　　3, display the curre

0.946441] serial:8250/16550 driver, 6 ports, IRQ sharing enabled [ 0.946533] serial8250:ttys0 at I/O 0x3f8 (IRQ = 4) is a 16550A [ 0.946623] serial8250:ttys1 at I/o 0x2f8 (IRQ = 3) is a 16550A [ 0.946896] 00:06:ttys4 at I/o 0x210 (IRQ = one) is a 16550A [ 0.947012] 00:07:ttys5 at I/O 0x218 (IRQ = one) is a 16550A [ 0.947128] 00:08:ttys2 at I/o 0x220 (IRQ = one) is a 16550A [ 0. 947244] 00:09:ttys3 at I/o 0x228 (IRQ = one) is a 16550A [ 0

e-mail protocol has SMTP, POP2, POP3, IMAP4, etc., are subordinate to the TCP/IP protocol cluster, by default, the connection is established through TCP ports 25, 110 and 143 respectively. For different purposes and functions, we will adjust the mail server settings to suit your needs.Yesterday Foxmail suddenly broke down, I checked for a long while to find the reason, re-installed after the message and the client mail messages on the Web are inconsis

his machine is receiving.Bj-sw#show mac-address-table Dynamic Address 000d.5621.afd6Unicast EntriesVLAN MAC address type protocols port-------+---------------+--------+---------------------+--------------------000D.5621.AFD6 Dynamic IP,IPX GIGABITETHERNET3/2From the result it is connected via a gigabit port. Let's look at the neighbor (this is the two cascade switch of the core switching machine)Bj-sw-419-1-4#sh CDP NeighborsCapability codes:r-Router, T-trans Bridge, B-source Route BridgeS-swit

enabled by default. to open other ports, open the required ports. Vi/etc/sysconfig/ Iptables Then add -A RH-Firewall-1-INPUT-m state -- state NEW-m tcp-p tcp -- dport3001-j ACCEPT -A RH-Firewall-1-INPUT-m state -- state NEW-m tcp-p tcp -- dport3001-j ACCEPT Finally, the CentOS system needs to restart the service. /Sbin/service iptables restart /Sbin/service iptables restart Check whether the

# Enable port 22 iptables-AINPUT-ptcp -- dport22-jACCEPTiptables-AOUTPUT-ptcp -- sport22-jACCEPT # Disable all ports iptables-PINPUTDROPiptables-PFORWARDDROPiptables-POUTPUTDROP # enable port 80, HTT # enable port 22 Iptables-A input-p tcp -- dport 22-j ACCEPT Iptables-a output-p tcp -- sport 22-j ACCEPT # Disable all ports Iptables-P INPUT DROP Iptables-P FORWARD DROP Iptables-P OUTPUT DROP # Enable por

Check what services are running on the port lsof-I: 123. this 123 indicates the port number you want to view. disable ports not commonly used in LINUX and disable Port 111/etc/init. d/portmapstop close port 25/etc/init. d/sendmailsdrop disable port 631/etc/init. d/cupsstop close 9... view the services running on the port Lsof-I: 123 this 123 represents the port number you want to view Disable ports not comm

If selinux is not disabled, httpd cannot use non-80 or other default ports. in this case, the httpd port is changed to 9080, and the following prompt is displayed: [root @ haifeng ~] # ServicehttpdstartStartinghttpd :( 13) Permissiondenied: make_sock: couldnot... if selinux is not disabled, httpd cannot use non-80 or other default ports. in this case, the httpd port is changed to 9080, and the following pro

Precautions for binding ports to Linux Network Programming and port reuse (1) The so-called binding (bind) means that when someone connects to me, I can only use the port I bind, which is equivalent to buying a mobile phone. If someone else wants to contact me, he must know my mobile phone number, what should I do at this time? I need to plug in a phone card to fix a phone number so that someone else can contact me through this phone number. The mobi

"hard" operations on network devices. The security factor is high, but the obtained information is not accurate. For example, if the IP address of a server has been changed, we can think that the server is not connected to the network because the original IP address cannot be found on the switch. The system administrator first checks the IP address information on the server, and then finds out which port of the switch the IP address is located on. The information obtained by this method is very

In the previous studies on the BCM version, the WAN port was extended but could not be online due to the lack of in-depth research. Due to the time relationship, the research was not continued. When I first came back yesterday, I began to study this item and successfully expanded bcm to N Wan. I cut a picture and set one of the four or more ports to online. In fact, BCM expands the WAN, most of which is used for small bandwidth aggregation. This sav

Http://blog.csdn.net/wudiyi815/article/details/7473097 Premise: First, you must know that a port does not exist independently and is attached to a process. If a process is enabled, the corresponding port is enabled. if the process is disabled, the port is closed. If a process is enabled again next time, the corresponding port is enabled again. Rather than simply disabling a port, you can disable it. 1. You can use "~ $ Netstat-ANP "to check which po