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The grep command in Linux system is a powerful text search tool. It can use regular expressions to search text and print matching lines. The full name of grep is Global Regular Expression Print, which represents the global regular expression version, and its permission is for all users. grep works by searching for string templates in one or m ...

Many windows are very familiar with the ipconfig command line tool, which is used to obtain and modify network interface configuration information. Linux systems have a similar tool, ifconfig(interfaces config). Usually you need to log in as root or use sudo to use the ifconfig tool on your Linux machine. Depending on the option attributes use ...

ss is the abbreviation of Socket Statistics. As the name implies, the ss command can be used to obtain socket statistics, which can display content similar to netstat. But the advantage of ss is that it can display more detailed information about TCP and connection status, and it is faster and more efficient than netstat. When the number of s ...

The ps command in Linux is the abbreviation of Process Status. The ps command lists the processes currently running in the system. The ps command lists snapshots of the current processes, which are those processes at the time of execution of the ps command. If you want to dynamically display process information, you can use the top command. T ...

When processing matched files with the - exec option of the find command, the find command passes all matched files together to exec for execution. But some systems limit the length of commands that can be passed to exec, so that overflow errors occur after the find command runs for a few minutes. Error messages are usually "parameter col ...

Through SSH access to the server, it is inevitable to use compression, decompression, packaging, unpacking and so on. At this time, tar command is an indispensable powerful tool. The most popular tar in linux is sparrow, which is small, full of internal organs and powerful. The tar command creates files for linux files and directories. With t ...

Provide: ZStack Cloud Computing Series of tutorials This tutorial is for CoreOS Upper Finger Guide The third of nine articles in the series. Content introduction CoreOS provides us with a Docker container management platform across multi-server environments, and fleet services can significantly simplify the management of the entire clus ...

No important system can ignore server security, especially in the public cloud. There are many online tips and tutorials on this subject. Here we only look at a few basic and common best practices. Several security measures to be implemented after system configuration is completed Take Ubuntu 16.04 as an example: 1. Update the kernel ...

The network port multiplexing discussed in this paper does not refer to Socket Bind multiplexing with SO_REUSEADDR option in network programming. It is more like a port forwarding tool with a specific routing function, implemented in the application layer. background The firewall in my network only opens one port, but I hope to provide a variet ...

Not long ago, interns, now in the group to help dalao s run Case, from time to time to collect a wood Dump, every time the command is too annoying, so forced to learn to write their own Shell scripts. It was really painful at first, and I couldn't get any books. I could only draw pictures with half-truthful and half-truthful information on the ...