mongo shell commands

The basic job of the shell is to execute commands.The shell executes each command you type.$CD work;ls-l whizprog.cFirst: The format is simple, separating the various components of the command line with a blank Space key or TAB key.Second, the command name is the first item in the command line. Usually followed by option, any additional parameters (argument) will be placed after the optionThird, the option

In day-to-day shell work, History commands are edited, just like command line editing. As mentioned above, software quality testing faces a large number of complex system environments and involves a lot of complex work in these system environments. Although a large amount of work is complicated, there are also many duplicates, some of which are reflected in the duplication between different instances of com

What is 1.shell?From the user perspective: The shell is a bridge between users and LinuxFrom the programmer's Point of view: The shell itself is a program written in C languageThe shell acts as a translator, translating the commands entered by the user into instructions that

Tags: is slim blog segmentation problem Shell du-sh/etc/ErrorFive Week fifth session (January 12) 8.10 Shell Special Symbol Cut command 8.11 Sort_wc_uniq Command 8.12 tee_tr_split Command 8.13 Shell Special Symbol Related Quiz title: http://ask.apelearn.com/question/5437 Extended SOURCE Exec Difference http://alsww.blog.51ct

The ADB shell is often used during the development of Android applications, where a simple summary of the general commands is made.The content includes DOS, Linux, Shell three blocks (obtained through access to books and web data).1. First look at commands under Windows DOScd--changing the current directorydir--Display

-gravity northwest-Background transparent-extent 720x200 output.pngChange the size of a piece Lsof-IView the activity status of the local network service in real time. Vim SCP: // username @ host // path/to/somefileVim Remote File Python-M simplehttpserverTo implement an HTTP service in one sentence, set the current directory as the HTTP service directory.Http: // localhost: 8000Access may be the simplest HTTP server implementation on the planet.

How to execute Java commands in Android Everyone knows that, the following section of the content for you to bring a specific analysis. The Android program is based on Java development, and when we connect to the debugger, execute the ADB shell, we can execute the Linux commands, but we can't execute the Java commands

The android program calls shell commands and scripts, androidshell A function of android recently called shell commands to perform system-level operations, such as shutdown and startup, now let's summarize the specific usage and pitfalls (based on what I used, I won't talk about what I didn't use) (1) Runtime.getRunt

Call shell commands and scripts in android A function of android recently called shell commands to perform system-level operations, such as shutdown and startup, now let's summarize the specific usage and pitfalls (based on what I used, I won't talk about what I didn't use) (1) Runtime.getRuntime().exec("ls"); This

Shell Internal commands: 1: exec command If the common commands such as ls, cat, and less are executed in the current Shell, the Shell process ends after the exec command is executed. Therefore, we generally put the command into the script for execution. After the comma

need to pause the availability of the table first, such as the alter operation above, and the deletion of the table. Disable_all and Enable_all are able to manipulate more tables.(9) Deletion of tablesStop the table's usability before you execute the delete command.Drop ' t1′The above is a few common commands in detail, the specific all hbase shell commands are

Shell Common commands 1. ls: similar to the dir command in dos The most common parameters of ls include-a-l-F. Ls- Linux Files. files starting with ls are regarded as hidden files and cannot be seen only by using ls commands. In addition to displaying common file names, ls-a can also display hidden files. Ls-l This parameter displays more detailed file informatio

Structured commands: Allow scripts to skip or execute these commands cyclically based on the conditions of variable values or the results of other commands 1. Use the if_then statement If command Then Commands Fi Run the command after if first. If the exit status of the command is 0 (the command is successfully e

. Here's an example:>>> process = subprocess. Popen ([' Echo ', ' Hello world! '], Shell=false)>>> Process.poll ()>>> Print Process.returncodeNone>>> Process.poll ()0>>> Print Process.returncode0This returncode is not set at the beginning, initially is the default of none, it will always be none of the methods that you know to call subprocess such as poll () and wait (). These methods will set the ReturnCode. So, if you want to know the return value,

deposit element that is given a name.The name of the shell variable can be made up of numbers, letters, and underscores. There are two types of shell variables, shell environment variables and user-defined variables.1.Shell Environment variables(1) Writable shell environmen

Function description: starts or disables built-in shell commands. Syntax: enable [-n] [-all] [built-in commands] Supplement: if the name of the file to be executed is the same as that of the shell built-in commands, enable-n can be used to disable the

Executing shell commands in the VIM editor The 11th Chapter VI and VIM text editors for Linux commands, editors, and shell programming, this chapter will briefly describe how to edit text using the VI and VIM editors. This section describes the execution of Shell

look at the usage of declare-r.These several options can be used in combination. This blog is actually written this week in Monday or Tuesday. But this week's physical and mental state is not very good. As a result, blogs are not continuously updated.Although I know that the blog in the Garden of Daniel gathered, for my share of the fundamental disdain. But it's going to go on.By the way to talk about their own sentiment: time really will make a person happen Sanghaisanda great changes. S

Android commonly used adb shell commands, androidadb Debugging Android programs sometimes requires the adb shell command. adb stands for Android Debug Bridge, which serves as the debugging Bridge. Through adb, We can debug the Android program through DDMS in Eclipse. To put it bluntly, it is the debug tool. Adb listens to Socket TCP 5554 and other ports to allow

Now, based on the development of Linux, Internet products are basically based on Linux,android,mac, Linux everywhere, so, as a time-tested, not familiar with Linux is not good, record some of the common shell commands in the test.1, LS: Print out the list of the current directoryFiles on Ls–a:linux are treated as hidden files by the system, and only the LS command is not visible to them, and the hidden file