Learn the PG start-up process today.The start command for pg./bin/postgres-d Path/to/data.1. Subject monitoring ProcessThe postmaster process enters an infinite loop, waiting for the client to request and provide the requested service. In an infinite loop, the postmaster process periodically checks for client service requests by invoking the operating system inte
Summary of Postgres operations in Ubuntu
1.Basic operation commands
After the installation is complete, PostgreSQL creates a database user account named Postgres by default. It is a super Administrator account like the root account of MySQL and the SA account of sqlserver, but unlike MySQL, postgreSQL also created a Unix account named S.
Like the master
selectextract (ISOYEAR fromfromdate_) asyear_,--the year in which the week was made extract (WEEKFROM fromdate_) asweek_,--the year in which the week was made To_char (fromDate _, ' YYYYMMDD ') asfromdate_,--Week start date to_char (todate_, ' YYYYMMDD ') as End date of todate_--week from (select (date (curDate) -7*weeks_) asfromDate_, (date (curdate) -7*weeks_+6) as toDate_from (selectgenerate_series (1,100) weeks_, -- interval weeks (sequence, here
Tags: Data Manager man OWIN EPS 3.1 lib Apt-get codeSteps that worked for me Ubuntu 8.04.2 on to removepostgres 8.3
List all Postgres Related packages dpkg-l | grep postgresii PostgreSQL 8.3.17-0ubuntu0.8.04.1 Object-relati Onal SQL Database (latest VERSIII postgresql-8.3 8.3.9-0ubuntu8.04 Object-relationa L SQL Database, version 8.3ii postgresql-client 8.3.9-0ubuntu8.04 front-end programs F or Postg
Label:Recently the company requested to back up the database, so we looked up the comparative information. Don't say much nonsense, into the subject. Objective: To regularly back up the Postgres database under Ubuntu, and to pack and upload to the designated FTP server. After finding the information, the workaround: ① Write a backup database, package compression, upload the specified FTP script. ② adds the
A few months ago, after the ubuntu14.04, due to improper guidance, the start-up interface Win8 has been invalid, always loop into the startup item selection interface.Before the Ubuntu Chinese forum to find related issues, and finally in an old post found in the launch screen by pressing "E" to edit the startup item after the boot, and finally succeeded. However, each reboot will revert to the previous stat
Start Ubuntu enable auto start chkconfig
Abstract: in many cases, we need to enable certain services to run automatically at startup, such as Apache and MySQL. Or, at other times, we need to set the value of certain environment variables and modify runlevel when starting the system. At this time, we need to understand the starting process of the system.
1.
Recently, because of the Linux development with teammates, because not the same version of Linux (he used the arch, I use Ubuntu), and then often the configuration is not the same, as the Inittab file, and then delve into the reason:The Linux kernel starts init, and the init process ID is 1, which is the parent process of all processes, and all processes are controlled by it.Ubuntu start-up is controlled by
"+"--mount point: "/"--Size: 22000mb--new partition type: Primary partition-New partition location: Idle start location-for: EXT4 log file system.
Second partition: Do not set mount point; Size: 2048MB; logical partition; idle start position; for: Swap space
Third Partition: mount point: "/boot"; size: 200MB; idle in fact location; EST4 log File system
Fourth partition: mount point: "/
After eclipse is installed according to install eclipse indigo 3.7.2 in Ubuntu 12.04, it is not very convenient to start it. You need to switch to the terminal status and executeEclipseCommand to start.
Ubuntu 12.04 is usedUnityIn the left-side navigation pane of the desktop. We can place an icon in the starter ba
To set up in Eclipse, you can display the Quick launch on weekends and resolve the issue where eclipse does not display a list in the Ubuntu high version by clicking on the menu bar item:Create a Eclipse.desktop file under the Usr/share/app-install/desktop directory, such as the following command:sudo gedit/usr/share/app-install/desktop/eclipse.desktopIn this file, enter:[Desktop Entry] Name=eclipsecomment=eclipse ideexec=env ubuntu_menuproxy=0/job/an
be so worried. As far as my personal experience is concerned, replacing windows as the first operating system is no problem at all. And because the next semester to start computer network, I also intend to all the experimental courses are used in Ubuntu to do, so here in advance to write this topic, is a lesson, wait until home studio environment, I recorded a few quality better video, look forward to ever
Configure NTFS-3g
First, let's look at the partition types of some hard disk partitions.# Sudo fdisk-l
Now you can modify/Etc/fstab to automatically mount NTFS partitions when Ubuntu is started. But first back up this file:# Sudo CP/etc/fstab. Bak
Create a mount point. For example, mount it to/Media/windows.# Sudo mkdir/Media/Windows
Now you can add/Dev/hda1/Media/ntfs-3g ults, locale = zh_cn.utf8 0 0Modify according to your own situation.
Examples
M
There is no optical drive or soft drive. Use Ubuntu to start a USB flash drive to install DOS and Windows XP. If a computer does not have an optical drive or a soft drive, or an optical drive but a CD is not installed, or the optical drive is broken, what should I do if the Windows XP system fails or cannot be started? Here I think of a method for reinstalling the system. Of course this is not the only meth
VISTA and UBUNTU dual-start-general Linux technology-Linux technology and application information. The following is a detailed description. I. The hard disk is brand new. XP is installed first, and Ubuntu is installed. Now grub is taken for the boot, and then enter DOS, type fdisk/mbr, and hand the boot to XP, modify boot. ini points to the grub4dos of drive C, a
14.04 systems on a laptop, it is better to remove some disk space under Windows to leave Ubuntu. If you are a win7 or Win8 Pro user, you can get free space by right-clicking on the selected disk by using the Disk Management, Storage-managed disks, and then, for other users, you can use partitioning tools such as partition assistants to get free space. First of all, for the partition of the disk used in Ubuntu
Install ubuntu on a USB flash drive and start Linux from the USB flash drive.
If we install the Linux system directly on our hard disk, the GRUB of Linux will overwrite the boot guide of window. It is not convenient to carry. So I want to install a ubuntu system on a USB flash drive, which can be started on any computer.
Preparations:
A 32g usb flash drive (as
How does I start, restart, or stop Apache 2.x Web server on Ubuntu Linux operating systems using the command line options?You can use any one of the following method to Restart/start/stop your Apache (httpd) sever on Ubuntu:Tutorial Details
Difficulty
Easy (RSS)
Root Privileges
Yes
Requirements
Shell
I used Ubuntu in the first few days, I suddenly came up with a prompt to activate the hardware driver. I am a FGLRX driver dedicated to ATI/AMD. I just clicked Activate without looking at it carefully.
As a result, the screen is black when you enter Ubuntu the next day, and ctrl + alt + F1 cannot be switched to the command line.
Solution:
1. Start the compute
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