head first mysql

Reset of Branch question: when there is a new commit, the contents of the reference file for the master branch change. The contents of the reference file for the master branch can be artificially altered. Touch New-commit.txt git add new-commit.txt Git commit-m "Judge" Cat. Git/refs/heads/master #发现内容确实改变了 git log--graph--oneline #查看提交日志 and saw just submitted Git reset can point the master reference to any one of the existing commit IDs. (the--hard parameter destroys uncom

Head and tail are all data selected by the unit of behavior, head is taken out front, tail is taken out of the back.Head(remove the previous lines)1. Command format:Head [parameters] ... [File] ...2. Command parameters:-Q Hide file names-V Show file name-c-ncommand example:1. By default, the first 10 rows are displayed[[email protected] zdw]# head 123.log 1234567

Linuxtext File View, show commands: Cat head tail grep more less NL1. Cat Displays the file Contents command. Command format:#cat [[options]] Common options: -B, calculates all non-empty output lines, starting with a line number of 1. -N, all output lines (including blank lines) are computed, and the start line number is 1. -S, replacing multiple empty lines that are connected with a blank line. -E, add the $ symbol at the end o

WPS Office 2002 is a set of office software suitable for use in China. Many schools use the software, especially in the row of mathematics, physics, Chemistry and other papers, simple and quick formula input is very popular with teachers. But at this time, the production of paper rolls became a problem, many teachers use the method of inserting pictures to make paper volume head, in the actual operation, although the direct insertion has been done th

Today, I encountered the same problem with CSDN, that is, using git-branch-a to find yourself at a zero-point branch. This blog post is very good, reproduced record.Reprint: http://blog.csdn.net/lili625/article/details/46583217+ Git fetch--allfetching originaddress IP address maps to git address, but Thisdoes not map back to the address-possible break-in attempt!+git checkout masterprevious HEAD position was8928318... add test fileswitched to branch'

In linux, The ElasticSearch.6.2.1 and head, Kibana, X-Pack, SQL, IK, and PINYIN plug-ins are configured and installed,1. Install elasticsearch-head1.1 directly using command Installation Error elasticsearch-6.2.0\bin>elasticsearch-plugin install elasticsearch-headA tool for managing installed elasticsearch pluginsCommands--------list - Lists installed elasticsearch pluginsinstall - Install a pluginremove - removes a plugin from ElasticsearchNon-option

Step one, to brush a small point in a big minor, select the draw[drawing] tool, draw a new Z-ball as the neck under the head Z Ball, and adjust its position and size, as shown in the following figure. Step two, adjust the position and size of the top Z-ball, you can press a key to the head grid preview, as shown in the figure. Step three, press a again to return to the Z-ball mode,

Slash head making Excel to make a table is very simple, select a certain area, right-click Select "Format cell" (or directly press ctrl+1 key) out of the Settings dialog box, switch to the "border" set the box line, you can quickly get a table. The table in the diagram above is slightly more difficult than the diagonal in the header, which is actually very simple. When the cell is selected, enter the cell's border settings, you can see t

Print a single linked list from the end of the head void Fromtailtoheadprint (slistnode* head) {stack 2. delete Voiderase (Slistnode*head,slistnode*pos) {//: Empty node, one node, two nodes, Three nodes if (head==null| | pos==null) {return; }if (Head==pos) {free (

[CNN] interpretation of Light-Head R-CNN: Balancing accuracy and speed, light-headr-cnnSpeaker: Li Zeming | researcher at the face ++ Research InstituteEdit Qu XinProduced by QbitAI | public account QbitAI On the evening of December 20, the quantum bit eat melon club and Face ++ paper interpretation series of the third phase of the lecture, this issue in the Face (Megvii) Research Institute to interpret the recent published Light-

The head command is used to display the contents at the beginning of the file. By default, the head command displays the contents of the first 10 lines of the file.If more than one file is specified, the file name is given as the header before each segment of the output.If you do not specify a file, or if the file is "-", the data is read from the standard input.(1) Usage:Usage:

Elasticsearch 5.0--head Plug-in Deployment Guide The basic use of ES will use the head, but the version upgrade to 5.0, the head plug-in is not good to make. Let's see how to start the head plugin in 5.0. Official Rough Tutorials Running with built in server Enable cors by adding http.cors.enabled:true in Elasticsearc

Linux View log file Contents command tail, Cat, TAC, head, EchoTail-f Test.logYou will see that the screen is constantly being printed out. This time interrupts the first process ctrl-c,---------------------------How Linux displays a few lines of a file (in the middle of a few lines)Starting at line No. 3000, displays 1000 rows. The 3000~3999 line is displayedCat FileName | Tail-n +3000 | Head-n 1000Display

The head and tail of a Linux command every dayIn fact, as long as you understand the meaning of these two English words, you can understand the role of these two commands. Head: The tail is the opposite: the tail, the former print the contents of the file, the latter print the file tail contentHead Test.log tail test.log both are default print 10 lines of course, the number of printed lines can also be adju

help;U move up the half screen;W can specify which line to start displaying, which is displayed from the next line of the specified number, for example, 6, which is displayed from line 7th;G jumps to the first line;G jumps to the last line;P n% jumps to n%, such as 10%, which means that it starts at 10% of the entire file content;/pattern searches for pattern, such as/mail, to search for mail words in a file;V Call VI Editor;Q Exit Less!command Call the shell, you can run the command, such as!l