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Linux Daily Management 1

[Email protected] ~]# W17:52:51 up 2 days, 1:23, 1 user, Load average:0.00, 0.00, 0.00Time runs for several hours a few users 1 minutes load 5 minutes load 15 min loadUSER TTY from [email protected] IDLE jcpu PCPURoot pts/0 192.168.100.5 17:50 1.00s 0.86s 0.67s WExplanation

Explanation of the meaning of shell variable $#,$@,$0,$1,$2 in "Go" Linux

Original URL: http://www.cnblogs.com/fhefh/archive/2011/04/15/2017613.htmlThe meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All parameter lists. such as "$*" in the Case of

FTP Service setup in Linux--1. Anonymous and Permissions

on the ability to restrict users in the home directory Chroot_list_file=/etc/vsftpd/chroot_list #在chroot_list文件中加入你要限制的用户名, one user #----virtual user settings----PAM_ SERVICE_NAME=VSFTPD #虚拟用户使用PAM认证方式 #----Control user access (implemented via Vsftpd.user_list and ftpusers files)----userlist_ Enable=yes #是否启用userlist_file文件 userlist_file=/etc/vsftpd/user_list #允许user_list文件中加入的用户访问ftp服务器 #----Control Host access---- Tcp_wrappers=yes #vsftpd服务器检查

Build an experimental environment for a large website architecture (Squid Cache Server) page 1/2

address of the machine running Squid. You can change it to the following: Http_port 192.168.100.254: 3128 The preceding statement indicates that Squid is bound to the IP address 192.168.100.254 and port 3128. The port can be set to any value, but make sure that no other program uses the same port. The/etc/services file lists common ports. If you want to set other ports for squid, you can refer to the content of this file to prevent repeated settings.

1~2_mysql configuration password reset & Mysql Login

Tags: mysql configuration password reset mysql LoginMySQL mo MySQL is not set password, under normal circumstances or should be set up a password.[Email protected] ~]# Mysql-urootQuit with quit.Set a password for MySQL[Email protected] ~]# mysqladmin-uroot password ' zaq12wsx 'If we forget the MySQL password, how to solve it?Initialize password[email protected]

Nagios Introduction and Installation (1)

: At least Nagios core, Nagios Plugins, Optional (NRPE, NSCA, SNMP)Monitored: If linux, you need to install Nagios plugins, NRPE (because NRPE relies on the former)If it is windows, install nsclient++.1, prerequisites[[email protected] ~]# yum-y install wget httpd php gcc glibc glibc-common gd gd-devel make NET-SNMP2. Download Nagios Core and Nagios Plugins Tarballs[Ema

Explanation of the meaning of shell variable $#,$@,$0,$1,$2 in Linux

The meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All parameter lists. such as "$*" in the Case of "" ", in the form of" $ $ ... $n "output all parameters.[

Oracle PL/SQL Learning Basics (1)

type]) ...]is SELECT statement;Properties:%found,%notfound--is there a record%isopen--Determine if the cursor is open%rowcount--Number of rows affectedNumber of cursors limit:Connecting the SYS user in the SqlplusConn Sys/[email PROTECTED]:1521/ORCL as SysdbaTo view configuration parameters:Show parameter cursorTo modify the settings for the number of cursors:Alter system set OPEN_CURSORS=400 Scope=both;Sc

Linux installation VMware Tools methods (1)

allow you to move the mouse cursor smoothly between the virtual machine and the host graphical user interface. The cursor settings also allow you to copy and paste the text cache between the virtual machine and the host, and from one virtual machine to another virtual machine. Note that these enhancements are available only when the application is running.Linux VMware Tools Installation steps:(1) Select th

ASP. NET Core Identity hands on (1)--identity first Experience

later, if you do not understand it, do not worryAspNetUsers, AspNetRoles and AspNetUserRoles Store user and role informationAspNetUserTokens, AspNetUserLogins stored in the user's use of the external login provider's information and tokens, external login provider refers to such as microblogging, QQ, Google, Microsoft, such as the provision of OAuth or OpenID connect to the manufacturer. For example, Segmentfault can use Weibo to loginAnd then we're going to explain the most important table.Asp

140 tips for using Windows (1)

restore it to its original appearance. 19. Optimize Visual Effects The operating interface of Windows XP is indeed very nice. Behind it is the cost of consuming a large amount of memory. Compared with speed and beauty, we would rather choose the former, right-click "my computer" and click "properties/advanced". In the "performance" column, click "Settings/Visual Effects". All settings of the appearance are

[Redis Album] [Methods and steps for installing Php-redis under 1]ubuntu12.04

'-._ '-._ '-./_.-' _.-'| '-._ '-._ '-.__.-' _.-' _.-' ||'-._ '-._ _.-' _.-' | Http://redis.io'-._ '-._ '-.__.-' _.-' _.-'| '-._ '-._ '-.__.-' _.-' _.-' || '-._ '-._ _.-' _.-' |'-._ '-._ '-.__.-' _.-' _.-''-._ '-.__.-' _.-''-._ _.-''-.__.-' [16859] 10:05:30.308 # Server started, Redis version 2.8.13[16859] 10:05:30.308 # WARNING Overcommit_memory is set to 0! Background save may fail under low memory condition. To fix this issue add ' Vm.overcommit_memory =

Linux Command Learning 1

double quotation marks. Understanding Long Format DisplayThe following example uses the CentOS 7 demo, ls-l equivalent to LL [[email Protected] app]# cat/etc/redhat-release CentOS Linux release 7.1.1503 (Core) [[email Protected] app]# ls-l Total usage 2636 -rw-r--r--. 1 root root 1222783 October 12:09 glances-1.7.1.tar.gz -rw-r

Two 30 GB hard disks for RAID 1

In this experiment, we need to add two new 30 GB hard disks. [[Email protected] ~] # Uname- Linux zzsrv1.localdomain 3.10.0-123. el7.x86 _ 64 #1 SMP mon Jun 30 12:09:22 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux We can display the disk without restarting it. [[Email protected] ~] # Echo "---">/sys/class/scsi_host/host0/scan [[

Linux Disk Management (1)--Disk Mount

The standard computer system is 1024, but the hard disk storage factory is 1000, and the memory is 1024. The units stored are in bytes.1. View Linux hard disk partitionsTo view the partition of the hard disk under Linux:[Email protected] notepad]# fdisk-lDISK/DEV/SDA: 16.1 GB, 16106127360 bytes255 heads, Sectors/track, 1958 cylindersUnits = Cylinders of 16065 * 8225280 bytesSector size (logical/physical): b

One Linux command per day (1): Exec of the Find command

space and a \, and finally a semicolon. In order to use the EXEC option, you must use the Print option at the same time. If you verify the Find command, you will see that the command outputs only the relative path and file name from the current path.The instance 1:ls-l command is placed in the-exec option of the Find commandCommand:Find. -type f-exec ls-l {} \;Output:[[email protected] test]# find. -type f

Java Web Integration Development (Appendix 1)-Installation configuration environment

----------------------------------------------------------------------------------------------------1. Install JDKhttp://blog.csdn.net/sonnet123/article/details/9169741Download JDKHttp://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.htmlExport java_home=/usr/java/jdk1.7.0_25Export classpath=.: $JAVA _home/jre/lib/rt.jar: $JAVA _home/lib/dt.jar: $JAVA _home/lib/tools.jarExport path= $PATH: $JAVA _home/binIf the old JDK version

Shell (1)

environment variable PathExport Path=/usr/local/apache/bin: $PATHCommand substitution:Echo " Today is ' date +%f ' " -protected [email]echo 'date +%f-%h:%m: %S-(+)-£ ºGenerating sequences [emailprotected]:/$ seq 3 Span style= "COLOR: #800080" >1 2 3 Span style= "COLOR: #000000" >[emailprotected] -virtual-machine:/$ seq 3 6 3 4 5 6 [emailprotected] -virtual-machine:/$ seq

Linux process identifier specific explanation 1

same way as the first two. However, they are based on the identifier of the process program file to infer the setting. As a result, a root program file can seteuid itself again () to root at any time.Root execution results:[Email protected] file]#./a.outUid=0,euid=0uid=1000,euid=1000Setuid to Root:operation not permittedExecution Result:The above example shows that a process that is not referenced by a superuser can only set its valid user and valid

Oracle Daily Operations Summary-(1)

synthesis of forcibly shutting down the database (shutdown abort) and starting the database (startup) two commands. This command is only used when the database is closed and the database is not closed. ALTER DATABASE OPEN READ only; This command opens the database as read-only after the instance is created and the database is installed. A product database that only provides query functionality can be opened in this way. Ii. Creating a database user 2.1 Log in to the database as a DBA user (s

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