common alexa commands

Original: chAnge file grouP ownershipCommand location:/bin/chowmExecute Permissions: All UsersFunction Description: Change the owning group of a file or directorySyntax: chown [user] [file or directory]----------------------------------------------------------------------------------Rights Management Command : umaskCommand name: umaskCommand English Original: the user file-creation MaskCommand path: Shell built-in commandsExecute Permissions: All UsersFunction Description: Display, set default

The power of Linux is command management.1. copy = CP copy2, dir = lsRwx=read.write. Execution3, adjust the network:Setup Enter Select the third item (network configuration) to enter (the first is to configure the network card, the second is to configure DNS) to configure the network card, select Enter, and then set the DHCP or fixed IP to configure. Save exit.(The configuration file is: Cat/etc/sysconfig/network-scripts/ifcfg-eth0)Use VI Editor to adjust the modified fileUse Vi/etc/sysconfig/ne

installed, even if there is no network card, pensive IP The address can also be ping through. And, even if ping a host and ping , and not necessarily the network has a problem, there are many kinds of possible causes this situation, and later to study carefully.4. ifconfig [/sbin/ifconfig] #用于查看网卡信息, the-a option is added by default in Linux , but in UNIX The add-a option must be displayed in the system . e.g.IfconfigIfconfig eth0// View physical NIC onlyIfconfig ech0 192.168.1.104// set IP

execution file, simply said it is just a link to the original file.The permissions of the soft link file are equivalent to the permissions of the shortcut keys, and do not affect the permissions of the original fileThe three main features of a soft link file:(1) All soft link files are identified by the letter "L"(2) All soft link files have an arrow "-" pointing to the original file(3) All soft link file permissions are lrwxrwxrwx, and the file is relatively small Hard - link files: similar to

the amount of free memory# uptime # View System uptime, number of users, load# cat/proc/loadavg # View System load4. View disks and partitions# Mount | COLUMN-T # Viewing the status of a mounted partition# fdisk-l # View all partitions# swapon-s # View all swap partitions# hdparm-i/dev/hda # View disk parameters (for IDE devices only)# DMESG | grep IDE # View IDE device detection status at startup5. View network Information# ifconfig # View the properties of all network interfaces# iptables-l #

BCD or MV-T target sourceExamplesRename in the same directory, there is an ABC file can be the MV ABC BCD to rename the ABC to BCDFile : Used to view the types of normal and system filesRMRM: Deleting files-I: interactive delete-F: Violent deletion-R: recursive deletecommands can be combined withTouchTouch: Create a file-C: The file is not created when it exists-A: Change the access time of the file only-M: Change the file's modification time only-T: Set the timestamp of the file (month and day

file1file2 >> file3 file1 and file2 document content with line numbers (blank lines not added) after attaching the contents to the File3 document:If the original B.txt file is not. So:Cat >b.txt EofAfter entering the first line, input EOF, enter, you can generate a b.txt file. Where EOF is telling bash which symbol represents the end of the file. Of course you can also use your own custom symbols.[email protected] tmp]$ cat >B.TXT123Abc[email protected] tmp]$ cat B.txt123Empty the con

The shortcut key combinations that are often used in vim:Normal Mode:Ctrl F turn to the next page Ctrl B turn to previous page/search keyword n look down n findWith a single word selected, press to select N to find n up^ Jump to the beginning of the line to jump to the endG jumps to the end of the line GG jumps to the beginningEdit command:Insert a new line under the O-cursorO-Cursor Insert a new line aboveShortcut key combinations that are commonly used on the command line:CTRL + A cursor moves

Common Linux commands (2) -- permission management command 1. Command name: chmod www.2cto.com execution permission: All Users Function Description: Change the file or directory permission Syntax: chmod [{ugo} {+-=}{ rwx}] [file or directory] [mode = 421] [file or directory] chmod user type add or remove permission file or directory pair the owner of file a adds the execution permission [root @ localhost ab

Common linux shutdown and restart commands and linux restart commands1. shutdown Shut down after all services are closed -C: cancel the previous shutdown command. -H: Shutdown -R: restart -K: sends a shutdown reminder to all users, but does not shut down # Cancel shutdown command shutdown-c # immediately shut down (now) shutdown-h now # shutdown at # shutdown after 10 minutes of scheduled shutdown-h +

Linux vi Common commands and linux vi commandsI. move the cursorJ. Move a row down;K. Move a row up;H: move one character to the left;L move one character to the right;Ctrl + B Move the screen up;Ctrl + f move one screen down;$ Move to the end of the row;Move gg to the beginning of the document;Move GG to the end of the document;0 is moved to the beginning of the row;# G, for example, 5G, indicates moving t

The following are common file and directory operations commands for Linux operating systems:Cd/home Enter '/home ' directory ' NBSP;CD. Return to the previous level of directory NBSP;CD: /.. Return to the top level two directory NBSP;CD enter the personal home directory NBSP;CD ~user1 into the personal home directory NBSP;CD-return to the last directory pwd show work path ls view files in directory ls-f Vie

many new usages can be created. Of course, hopefully this feature will not have an impact on the memory storage performance of Redis's original very cow B.9. Redis modifies persistent paths and log pathsThe code is as follows:Vim redis.confLogfile/data/redis_cache/logs/redis.log #日志路径 #p# page title #e#Dir/data/redis_cache #持久化路径, make sure to copy the Dump.rdb persistent file to/data/redis_cache after modification.Kill Redis First, copy Dump.rdb, start10. Clear Redis CacheThe code is as follow

(a) U-boot common commands The main purpose of U-boot is to start the kernel, before starting the kernel, we generally use the u-boot command to download kernel to memory, erase, read and write Flash, run memory, NOR Flash, NAND Flash program, view, modify, compare in-memory data, etc. The help command can see what commands are supported by the U-boot: These

improve security as far as possible, the anonymous account should be deleted, the root account password, the following commands can be used:Use MySQL;Delete from User where user= "";Update User set Password=password (' NewPassword ') where user= ' root ';If you want to restrict the logon terminal used by users, you can update the user's host field in the user table, and you should restart the database service when you make the above changes, and you

1. Redis View all current key Copy Code code as follows: KEYS * 2. View the current Redis configuration information Copy Code code as follows: CONFIG Get * 3. misconf Redis is configured to save RDB snapshots, but are currently not able to persist on disk. Commands that may modify the data set are disabled. Please check Redis logs for details about the error. Force stop Redis Snapshot cause redis Run u

[MySQL] highlights of Common Errors and Common commands[Background]When using the SQL Server database, you must have had experience solving various problems. In many cases, you may find problems and solutions in your blog. Currently, the MySQL database is used for development. Now, we find that we are experiencing more and more experiences in MySQL. Two days ago,

Prior to using GIT, SVN version management was used, and the biggest difference with SVN is that git has two warehouses, one is a local repository, one is a shared repository on a server, and a local repository is unique to every developer, even if commit commits to the local repository only. This is just one of the advantages of Git's popularity, and the version management tools developed by Linux authors are very grounded, and they're a big spot for popularity. What git

written by Richard Stallman and David mackenzie.reporting BUGS report BUGS to As you can see here, the info LS can give a detailed descriptionfirst you will see the title of each part of name,copyright, the meaning of the specific referenceName name, simple command is used to do what the synopsis short instructions use syntax description detailed description command using options for synopsis, Make a detailed exposition of the commands that can be is

SECURECRT is the software that logs on to Linux's server primary key under WindowsSummarize the common Linux commands in your work:Su-admin Switching usersDF-HL Viewing disk space remainingTail-f Bkxx-service-info.log View Real-time logsVim Bkxx-service-info.log open log file; Shift+g jump to the last page of the log;Less bkxx-ds.xml viewing configuration filesgrep bkxx-data-sync.log--color View log content