dmesg command

1. Beijing fast _ Three build Q1446595067 Linux is a set of and based on the GNU Combination Software and the Linux kernel. 2. What is a shell? We often hear Shell,shell, but what is a shell? Shell---> Shell, we all know that the Linux kernel is used to handle all the commands in the Linux System Center, it does not have the idea, as long as the command is transmitted to it, it will execute, but all the

{system.invalidoperationexception: If the connection assigned to the command is in a locally pending transaction, ExecuteReader requires the command to have a transaction. The Transaction property of the command has not been initialized.In System.Data.OleDb.OleDbConnectionInternal.ValidateTransaction (oledbtransaction transaction, String method)In System.Data.Ole

Linux Command Learning (1) -- ls command, linux Command learning ls The first thing you need to know is the command prompt. [Root @ localhost ~] # Current login user (root) Host Name (localhost) Current Directory (Home Directory) Super User prompt (#) Normal user prompt ($) 1.1

Linux Command curl command details, linux Command curl detailsCommand: curlIn linux, curl is a File Transfer tool that uses URL rules to work under the command line. It can be said that it is a powerful http command line tool. It supports file upload and download. It is a co

The date command is used to display the time, and the CAL command is used to display the calendar.Some of the common formats for the date command are%H hours (expressed in 00-23).%IHours (expressed in 01-12).%K hours (expressed in 0-23).%l hours (expressed in 0-12).%M minutes (expressed in 00-59).%P am or PM.%r time (including hours, minutes and seconds, hour is

($ |:)"; then 9 if ["$2" = "after"]; then10 PATH = $ PATH: $111 else12 PATH = $1: $ PATH13 fi14 fi15} 16 17 # Path manipulation18 if ['id-U' = 0]; then19 pathmunge/sbin20 pathmunge/usr/sbin21 pathmunge/usr/local/sbin22 fi23 24 pathmunge/usr/samples/bin after25 26 unset pathmunge27 28 # No core files by default29 ulimit-S- c 0>/dev/null 2> amp; 130 31 "/etc/profile" [converted] 49L, 842C Add at the end: 1 export PATH="/opt/STM/STLinux-2.3/devkit/sh4/bin:$PATH" Save and exit. Run the following

Linux Command (2): ls command, linux Command ls 1. Role: List the contents of a directory; 2. Format: Ls [Option] [file] [Option] specifies the file-related content to be viewed. If no file is specified, all files in the current directory are viewed by default; 3. Common Parameters: 4. Use instances: [Yourname @ www/] $ ls-l (can be abbreviated as ll) Total 220

Linux command rpm installation command, linux command rpm In Linux, almost all software is installed, uninstalled, and managed through RPM. RPM is called Redhat Package Manager. It is a software developed by Redhat to manage software packages in Linux. During Linux installation, almost all modules except several core modules are installed through RPM. RPM has fiv

The adb shell pm command is first recognized, and the auto-start command of the application is forbidden. The adbpm command Many people on the Forum wanted to cancel the auto-start startup of the application, so they wanted to know how it was implemented. However, Baidu once found out how to enable the application to boot, there is no hope for Baidu search materi

or stale[neigh]10.104.64.1 dev eth0 lladdr fe:ee:ff:ff:ff:ff according to its status stale[neigh]10.104.64.1 Dev eth0 lladdr fe:ee:ff:ff:ff:ff reachable[neigh]10.104.64.1 Dev eth0 lladdr fe:ee:ff:ff:ff:ff stale[neigh]10.104.64.1 Dev eth0 lladdr fe:ee:ff:ff:ff:ff reachable[neigh]10.104.64.1 Dev eth0 lladdr fe:ee:ff:ff:ff:ff stale[neigh]10.104.64.1 Dev eth0 lladdr fe:ee:ff:ff:ff:ff reachable# IP neighbour // View the MAC address of the device that is accessing your local area network 10.104.64.1

1. Add the following section at the end of the/etc/profile:user_ip= ' who-u am I 2>/dev/null| awk ' {print $NF} ' |sed-e ' s/[()]//g "Export histtimeformat= "[%F%t][' WhoAmI '][${user_ip}]"2. Source/etc/profile3. Execute whatever command you want,4. Perform the history and see the results:311 [2013-08-28 14:39:20][root][192.168.80.1] History312 [2013-08-28 14:39:43][root][192.168.80.1] Df-h313 [2013-08-28 14:39:45][root][192.168.80.1] Df-g314 [2013-08

Rm-rf mydir/* Delete the mydir directory */Cd mydir/* enter the mydir directory */Cd-/* Go back to the upper-level directory */Cd ~ /* Return to the root directory */Mv tools tool/* rename the tools directory to tool */Ln-s tool bac /* Create a symbolic link named bac for the tool directory. The most familiar thing is that www in FTP is linked to the public_html directory */ Cp-a tool/home/leavex/www/* Copy all files in the tool directory to the www directory */Rm go.tar/* Delete the go.tar file

"Ipconfig is not an internal command or an external command" solution, ipconfig is an external command 1. Right-click "computer" and select "properties" from the drop-down menu ". Second, select "Advanced System settings" in system properties ". In the system Properties dialog box, find the "advanced" tab at the top of it, which contains an "environment variabl

Linux Command File Content Query command-od, linux Command query od Name: od Location:/usr/bin/od Permission: All Users Purpose: view non-plain text files, such as binary files Usage: od [-t TYPE] File -T can be followed by outputs of various types A: Default reason characters are output. C: output using ASCII characters D [size]: output data in decimal

records (limit 3, 5)Db.users.find (). Skip (3). Limit (5);Sort sortsWith age ascending ASCDb.users.find (). Sort ({age:1}); With age descending desc db.users.find (). Sort ({Age:-1});Cursorfor (var C = Db.t3.find (); C.hasnext ();) {Printjson (C.next ());}MongoDB also has another way to handle cursors> Db.t3.find (). ForEach (function (u) {printjson (U);});Stored ProceduresThe first thing you need to know about stored procedures is that it's written in JavaScript.MongoDB stored procedures are s

10) db.char.find ({' name ': ' Weixiaobao '}). Skip (2). Limit (10)f) The query returns the number of bars Db.char.find ({' name ': ' Weixiaobao '}). Count ()g) sort (by name ascending, age descending) Db.char.find (). Sort ({' name ': 1, ' age ':-1})h) Query the specified column to db.char.distinct (' name ')i) Remove the set Db.char.drop ()j) Create index Db.char.ensureIndex ({' Name ': 1, ' Age ': 1},{unique:true})k) View index db.char.getIndexes ()L) Delete index Db.char.dropIndex (' IndexN

Command Line First, make sure that you have not changed the installation directory of MySQL.IfYou renamed or changed your pathTo change your path in the corresponding configuration file.Find the C: \ Windows \ my. ini file, change the path of the file you configured, and change it to the path you modified. Modify the service path.If your MySQL path is changed, the MySQL service cannot be started. PressWin + R key, enter services. mscCheck whether

# uname-a # View kernel/Os/cpu information # head-n 1/etc/issue # view OS version # cat/proc/cpuinfo # View CPU Information # HOS Tname # View computer name # LSPCI-TV # List all PCI devices # LSUSB-TV # list all USB devices # lsmod # list loaded kernel modules # env # View Environment variables Resources # free-m # View memory usage and swap area usage # df-h # View each partition usage # du-sh Disks and partitions

system's 32-bit or 64-bit Kernel Mode: isalist-v [isainfo-v] [isainfo-B] to view hardware information, including bios, cpu, memory, and other information: dmidecode is used to determine the current display refresh frequency:/usr/sbin/ffbconfig-rev? View System Configuration:/usr/platform/sun4u/sbin/prtdiag-v view the patches applied in the current system: showrev-p displays the current running level: who-rH: nslookup-class = chaos-q = txt version. bind view hardware information:

System # uname-a # View kernel/Os/cpu information# head-n 1/etc/issue # view OS version# cat/proc/cpuinfo # View CPU Information# hostname # View computer name# LSPCI-TV # list all PCI devices# LSUSB-TV # list all USB devices# lsmod # List of loaded kernel modules# env # View environment variable resources# free-m # View memory usage and swap area usage# df-h # View the usage of each partition# du-sh # grep Memtotal/proc/meminfo # View Total Memory# grep Memfree/proc/meminfo # View the amount of