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Shell & gt;/dev/null2 & gt; & amp; 1 details shell may often see: & gt;/dev/null2 & gt; & amp; the result of the 1 command can be defined in the form of % & gt;, where % & gt; indicates the file descriptor. We combine this command: & gt;/dev/null2 &

Concepts of Linux soft links and hard links 1. Linux link concepts Linux links are divided into two types: hard links and SymbolicLink ). By default, the ln command generates a hard link. [Hard connection] hard connection refers to the connection

Remember the password using ssh. Preface: In development, because you sometimes need to log on to the remote server through ssh, you have to enter the password every time. it is hard to remember the password and it is very troublesome, so I searched

Disable the independent video card NND in Linux and plan to install Ubuntu in The Notebook. The installation is very convenient, but it keeps shutting down when used. Later I found it was an issue of independent video card fever. I checked it online

Git version control puppet # git and puppet can be found in other documents # cd/etc/puppet/# gitinit # Initialize git # gitadd * # Add all files in the directory to gitcache # mkdir-p /data/git/# git... git version control puppet # git and puppet

The commands for mounting a USB flash disk in linux are as follows: # fdisk-l // find the device file name of your USB flash disk; # mkdir/mnt/flash // mount the device that created the USB flash disk to the address; #

Unable to obtain the lock/var/lib/dpkg/lock-open (11: temporary resource unavailable) solve the problem: an error occurs when the program is updated: unable to obtain the lock/var/lib/dpkg/lock-open (11: temporary resource unavailable) solution: in

Internal variable learning built-in variables, these variables will affect the behavior of bash scripts. $ BASHBash binary program file path root @ ubuntu :~ /Resource/shell-study/0506-2013 # echo $ BASH/bin/bash $ BASH_ENV this environment variable

Using msmtp to send emails via scripts such as sedmail and postfix is to configure the server as an email server, while msmtp is equivalent to a mail client (foxmail, outlook, and other clients ), we can apply for an email account from NetEase

UninitializedconstantRailsKindeditor (NameError) 1 & amp; #39;/media/cdrom0/runasroot. sh & amp; #39; 2cd/media/cdrom03sudoshVBoxLinuxAdditions. run4su-root5sudoshVBox... uninitialized constant RailsKindeditor (NameError) 1'/media/cdrom0/runasroot.

[Practice OK] in Linux, check the context of environment variables when the process (program) is started. because of the recent installation of jira In Linux, a Chinese plug-in is installed. once it is set to start, it is in English, and after the

Code # of the clear screen and cursor reset command Create_log.sh #! /Bin/bashwhiletruedodate>>log.txtsleep1done;to manually append the content Print_log.sh to log.txt #! /Bin/bashwhiletrue... clear screen and cursor reset command

Linux system review memorandum 5 is the fifth article in this series of documents. I plan to cover the logon, hard disk, periodic process, and other content. First, let's take a look at login: 5.1 login users in the second article, we talked about

Ubuntu displays or hides the grub selection menu ubuntu12.04. After windows is installed, the grub selection menu will be displayed at startup. you can select different versions of ubuntu kernel to start ubuntu, not after startup... ubuntu displays

Linux mount a mobile hard disk copy data (ubuntu) Step 1: insert a mobile hard disk, and then enter the command sudofdisk-l to view all the hard disk information and partition information, such: my is/dev/sdb1 * 20489767690234883834887 HPFS/NTFS...

Many Linux enterprise practical command companies use Linux servers. in actual development, they are all developed on the Windows platform and finally deployed on the Linxu server, in this process, many common Linux commands are encountered. Here we

The Vsftp configuration file has two types of FTP: PORTFTP, which is the common FTP? The other is PASVFTP, which is described as follows: www.2cto. comPORTFTP: this is a common form of FTP. first, a control channel is established. the default value

In Linux, the default cp command has an alias (aliascp & amp; rsquo; cp-I & amp; rsquo;) and cannot be forcibly overwritten, even if you use the-f parameter, the file cannot be forcibly overwritten. the following two methods are provided for cp

Binding multiple IP addresses in linux recently, sipP is used to bind multiple IP addresses to a single NIC. my system is Ubuntu12.04. the specific configuration is as follows: my system only has one Nic eth0, to bind multiple ip addresses to a

How to use remote desktop in Ubuntu sometimes, because of work needs, we may access our computer at home or elsewhere, remote access can be convenient for users to work, for Windows, Mac, and other users, remote access is no longer stable, but for