Linux

Sometimes when we execute sudo under Linux, there areXXX is not int the sudoers fileTell us that the current user is not sudoer, so we need to add the current user to the following steps:1, enter the Super User mode, that is, ' Su-' command, input

Grant is typically used to create users and authorizationsSyntax formatGRANTPriv_type [(column_list)][, Priv_type [(column_list)] ...On [object_type] Priv_levelTo User_specification [, user_specification] ...[REQUIRE {NONE | ssl_option [[and]

(All CentOS system commands in this article are represented by a bold slash, which is easy for you to read)I think a lot of people, like me, in the first contact with Linux, from the bottom of my heart is very offensive, obviously put windows so the

/var/spool/mail: Mail Directory/etc/skel: User Templates DirectoryAdministrative commands for users:Useradd:-u: Specify User ID-D: Manually specify the home directory-C: Specify the user's description-G Group Name: Manually specify the user's

Today the test key is logged into the Linux system with the following issues:[Email protected]:~# ssh [email protected]-P 80-i alickicxxxxxxx.key@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ warning:unprotected PRIVATE KEY file! @@@@@@

Just to talk about the process, as to the specific principles have not yet figured out.1. First you have to have font files, TTF or TTC format can beWe can copy the font file from the directory of WINDOWS C:\WINDOWS\Fonts\, for example, we get the

Test options after the IF [] in bash programming:1. Integer test:-le less equal-lt less than-ge Greater equal-GT greater than- eq equal-ne not equal2. Character test==!=>n tests whether null -s tests are not empty3. File test-

1. View the default Python versionPython-v2. Download the source package, wget https://www.python.org/ftp/python/2.7.11/Python-2.7.11.tgz3. (if required) install GCC for compiling Python source codeYum Install GCC4. Compiling the installationTar

In many cases, we need to write scripts on Windows to create a scheduled task program, which may require access to a Linux system, execute scripts, or upload downloaded files. And we don't want to install anything on windows. The best way is to use

Configure local yum source and linuxyum source in Linux Use yum to install software in non-network state for Linux Configuration To install software on a network, you only need one yum install xxx command. For example, if you only need one command

How to Use the sftp command in linux and the sftp command in linux Reprinted:BradyChen: http://www.cnblogs.com/chen1987lei/archive/2010/11/26/1888391.html Sftp is an interactive file transfer program. It is similar to ftp, But it performs encrypted

We recommend locking and forced locking in linux. As a reference for APUE section 14.3 Linux has a strong lock, but it is disabled by default. to enable linux to support mandatory locks, you must not only add-o mand when mounting, but also set

Ssh keys cannot be used to log on to Linux, sshlinux The following problem occurs when you test the key to log on to linux today: Root @ compute01 :~ # Ssh alicxxx@xxx.com-p 80-I alickicxxxxxxx. key @ WARNING: unprotected private key file!

Oracle environment variables are invalid in Linux. When maintaining the oracle database today, view the listener status and execute # Lsnrctl status Error:-bash: lsnrctl: command not found. This is not the case in the past. I thought about it for

Use of osprofiler in OpenStack Cinder Recently, performance debugging of OpenStack Cinder driver has been performed. Previously, decorator has been added to the driver to collect statistics on the execution time of each driver interface. In fact,

Idea of Nginx high concurrency Optimization I. socket 1. The nginx sub-process allows you to enable the maximum number of connections work_connections 10240 2. System (1) increase the maximum number of connections /Proc/sys/net/core/somaxconn

Configuration points of Nginx + Tomcat load balancing and dynamic/static separation in Linux This article uses the Linux release: CentOS6.7: https://wiki.centos.org/Download 1. Install Nginx Download Source: wget

Rapid deployment of Shell scripts for Tomcat Projects In order to perform cluster testing, three tomcat servers are installed on each machine. During each project release, multiple commands are required. Before restarting tomcat, check whether the

Enable PHP pseudo-static 1. Check whether Apache supports mod_rewrite.Use the phpinfo () function provided by php to view the environment configuration, and use Ctrl + F to find "Loaded Modules", which lists all Modules enabled by apache2handler. If

How to deploy the Icinga Server Icinga is a variant of Nagios. It is configured in almost the same way and fully compatible with the Nagios plug-in. Therefore, the following deployment scheme is also used for Nagios. It also introduced two Chinese