liberty basic commands

(+) Default ' Shenzhen ',Year Date); End of Build tableThe following is the Insert fieldInsert into teacher values (' ' ', ' Glchengang ', ' Shenzhen One ', ' 1976-10-10 ');Insert into teacher values (' ' ', ' Jack ', ' Shenzhen One ', ' 1975-12-23 ');Note: In the table under construction1. Set the ID to a numeric field of length 3: Int (3), and let it automatically add one to each record: auto_increment, and cannot be empty: NOT NULL, and let him be the main field primary key.2. Set name to a

(color of plot)Available Colors: red R, Green G, blue B, yellow y, pink m, cyan C, Black K.Example: T=0:PI/20:2*PI;Y=sin (t); Plot (x, Y, ' R '), plot (x, y, ' g+ ')(3). Other properties of the graph line (other characters of plot)to set the width of the drawing line: ' LineWidth 'edge Color of marker points: ' Markeredgecolor 'Fill Color: ' Markerfacecolor 'the size of the marker point: ' Markersize 'Example: Set the line shape, color, width, color, and size of the marker points.T=0:pi/20:pi;

Directory: 1. basicInstructions/basic 2. wget/download tool 3. crontab/timing task 4.tar/tar.gz/compressed file 5.vi/ editor cd [directory name] Conversion path cd .. return to the upper-level directory ls to display all the files in the current directory rm [-r]-f [] [file name] delete files, and add [-r] to delete all the sub-files in the file, for example, rm-rf [abc] deletes abc. Directory:1. BasicInstructions/Basic2. wget/download tool3. Crontab/

/get setting gets the information and returns nil if it does not exist.127.0. 0.1:6379>set t1 tOK127.0. 0.1:6379> get T1 "T"127.0. 0.1:6379> get T2 (nil)6.INCR (...) to increment the numeric string and return the incremented value, if there are multiple client operations on the same one, Redis guarantees that the operation is atomic and does not cause concurrency problems.127.0.0.1:6379> SetT11OK127.0.0.1:6379>Get T1 "1"127.0.0.1:6379>incr T1 (integer)2127.0.0.1:6379>Get T1 "2"7.append (...)

[Fengma family _ mysql] basic mysql commands, _ mysqlmysql Common database commands: Show Database Delete Database Connect to database View the database currently connected Common commands for Data Tables View table Modify Table Delete table Add the alter add command to add table fields. Modify Field Delete

Linux cainiao must also know several basic ubuntu commands 1: sudo should be one of the most common commands in linux, because you can temporarily obtain root permissions even if you are not a root user, for example, installing and uninstalling, changing the configuration of various services, and so on, remember that this 2: apt-get: apt is a software management

back to the top level directory, CD. /.. /.. Go back to Level three, CD-go back to the last operating directory and know that these commands are much more convenient when you switch directories back and forth.The 8.SCP command is a copy of the transfer file between two machines, which refers to a Danale blog to introduce, http://www.cnblogs.com/peida/archive/2013/03/15/2960802.html personal feeling written very good!9. File permission Description: Dr

up the most recent command with a keyword+ left | Right cursor moves in Word units+ C undo to enter the command+ D Close the current environment+ SHIFT + t # #在现有shell中重新打开一个table+ SHIFT + pageup|pagedown Toggle Table+ ALT + L lock screen+ ALT + up | down switch Work interface+ ALT + F1|F7 into the graphical interface+ ALT + F2-f6 into Virtual ConsoleThis article is from the "12148275" blog, please be sure to keep this source http://12158275.blog.51cto.com/12148275/1896940Linux Learning Notes-

Used_chunks Number of blocks already assigned to item Free_chunks Number of blocks not assigned to item Free_chunks_end Number of blocks currently available mem_requested The number of bytes requested to be stored in the slab Active_slabs Number of slab already allocated total_malloced Number of bytes already allocated to slab Item is stored in slab, and the size of the sla

largeTasks:123 Total Running process , 1 running one in run , 122 sleeping How many in sleep , 0 stopped stop , 0 Zombie Zombie State, indicating some sort of runawayCpu (s): 0.0%us User State , 0.0%sy System State , 0.0%ni, 100.0%id idle , 0.0%wa wait , 0.0%hi, 0. 0%si, 0.0%stmem:1914288k Total 1.9G memory , 1560028k used used , 354260k free idle , 207632k buffersSwap Swap partition usage 2097148k total, 0k used, 2097148k free, 616104k cached PID USER PR NI VIRT RES SHR S%cpu%MEM time+ COMMAND