Tag：Explain in detail
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Detailed explanation of tar decompression command
Format: Tar option file directory listFunction: package and backup the file directoryOptions:-c create a new archive-r append files to the end of the archive-x extract file from archive-o unpack the file to standard output-v output relevant information during processing-f for ordinary filesoperation-z calls gzip to compress the archive file, and when used with -x, calls […]
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Detailed explanation of Linux system configuration network
IinstallAnd configurationnetworkequipment IninstallIn Linux, if you have a network card,installThe program will prompt you to give the configuration parameters of TCP / IP network, such as local IP address, default gateway IP address, DNS IP address, etc According to these configuration parameters,installThe program will automatically compile the driver of the network card (first supported by […]
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Detailed explanation of VI command in Linux system
Command to enter VI VI filename: open or create a new file and place the cursor at the beginning of the first lineVI + n filename: open the file and place the cursor at the beginning of line nVI + filename: open the file and place the cursor at the beginning of the last lineVI […]
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Detailed explanation of Linux mount command
Linux is an excellent open source operating system, which can run on all kinds of computer systems from large to huge to small to handheld. With the increasing maturity and stability of Linux system and its unique advantages of open source code, Linux has been more and more widely used all over the world. Nowadays, […]
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Detailed explanation of MySQL explain output column
1. Introduction The explain statement provides information about how MySQL executes the statement. Explain is used with select, delete, insert, replace, and update statements. mysql> EXPLAIN SELECT * FROM employees WHERE emp_no = 10001; +—-+————-+———–+————+——-+—————+———+———+——-+——+———-+——-+ | id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows […]