lg alias

Reprint: http://www.91pen.net/linux-system-set-up-to-resolve-the-alias-command-to-restart-after-failure-problem.htmlIn the process of using a Linux system, most of the cases are performed under the character interface. There are some long commands that we don't want to repeat each time, which is not only a waste of time but also error-prone; we use the alias command to solveLike what:Alias ll=' ls-l--color

Entering shortcut commands in the terminal can improve productivity while keeping a few commands in mindHow to do:First edit in the ~/directory. Bash_profile This hidden file, if you want to directly double-click this file to open the editor, please enter it in the terminalMac Show hidden files command defaults write Com.apple.finder appleshowallfiles-bool trueAt this point you find the. bash_profile file in the ~/directory and open this fileAfter opening make sure that your source is set up, if

AliasUnaliasAlias view the current command's macro definition statusUnalias [command] cancels the macro definition of the commands (memory operations, non-modified macro definition source files, restart invalidation)To use the original command with the renamed command, add the "\" backslash symbol before the command, or use the absolute address of the command to invoke it.Cases:CP command, when there is a file with the same name at the destination address, prompts whether to overwrite pasteUse t

type safety 3. Performance is significantly improved by not forcing boxing and unboxing of value types, or by forcing type conversions downward on reference types. For value types, the general increase is 200%, and for reference types, it can also be increased by 100% (of course, the entire application may or may not be running more efficiently.) using generics in the structure body Defining the general structure body Codepublic struct point{public T x;Public T y;} Run instance CodePointPoint.x

table name for the student table, for example: Example 2: Query the Student table for all information, for example:Third, you can use arithmetic expressions in SQL statements:+ 、-、 *,/.?such as: selectempno,ename,sal+500 from EMP;So the SAL column can do the arithmetic and then display it in the query results."Attention" Select after assuming that add * , then * And then you can't add anything else, for example .SELECT *, sname from A is wrong. ? Example 3: Query the Student Table Section colum

MySQL Delete alias problem-log of meteor flame-NetEase Blog http://wzl3585493.blog.163.com/blog/static/7615611020126188377970/Delete from student s where s.id in (All-in);(Execution failed)Select s.* from student s where s.id in ();( executed successfully )Result Processing: 1. No aliasesSuch as:Delete from student where ID in (All-in-a);( successful execution )2. Alias is also added after deleteSuch as:Del

Tags: sed use replacement system optimization Learn Linux Delete files Lin configuration delete system filesToday the main learning of Linux alias configuration, the use of SED and system optimization, the Linux alias is mainly to prevent personnel operation errors, delete files and set up, but its biggest pit is to restart the server will be restored to the previous configuration, so you need to configure

This question is often asked on the Internet: Why does the alias I write not work under sudo? $ Alias ' ll=ls-l '$ sudo ll A-private-dirSudo:ll:command not found Why is that? Because under normal circumstances, alias only appears in the position of the command name of a simple command (most of the time the position of the first word) wi

parameter types supported by coherent operation Alias is used to define the aliases string for the current data table Help thinkphp Operation Way alias How to use, not the original ecological SQL notation Thinkphp in the development of the document is not missing the introduction of alias? Mine is thinkPHP3.1.2 's development document. Reply to discussion

Command 1: alias An alias is used for convenience. If you have a frequently-used command for a long time, you can set an alias to be equivalent. For example, the default alias of LS-Alf is ll. The alias format is as follows: Ali