Mysql command

Join tables on common columns.

mysql> select lookup.illustrationid, lookup.personid,person.birthday from lookup left join person on lookup.personid=person.personid=statement to join birthday in person table with primary illustration id;

This is a linux command line reference for common operations.

Command		Description
•	apropos whatis	Show commands pertinent to string. See also threadsafe
•	man -t ascii | ps2pdf - > ascii.pdf	make a pdf of a manual page
	which command	Show full path name of command
	time command	See how long a command takes
•	time cat	Start stopwatch. Ctrl-d to stop. See also sw
dir navigation

Cài đặt và cấu hình Subversion

1-      Cài đặt apache và svn:  yum install --exclude=*.i386 httpd* mod_dav_svn

2-      Cấu hình web apache:  vi /etc/httpd/conf.d/subversion.conf

+ Đường dẫn lưu trú của repos : /var/www/svn/kimsach/

            Cách tạo:

            #mkdir /var/www/svn

            #svnadmin create /var/www/svn/kimsach

Checking the file attributes using lsattr

lsattr is a command line program for listing the attributes on a Linux second extended file system
It is also a command to display attributes of devices on an AIX operating system

Quản lý tri thức-Một xu hướng của quản trị kinh doanh hiện đại

Trong điều kiện toàn cầu hóa kinh tế đang diễn ra một cách nhanh chóng trên toàn thế giới, cùng với sự phát triển với tốc độ chóng mặt của cuộc cách mạng khoa học kỹ thuật và công nghệ, các công ty đối mặt với rất nhiều cơ hội và thách thức do toàn cầu hóa và cuộc cách mạng khoa học - kỹ thuật - công nghệ mang lại. Nguồn nhân lực đã trở thành “một tài sản quý nhất, quan trọng nhất và quyết định nhất” cho sự tồn tại và phát triển của bất kỳ một tổ chức nào. Song, khi chúng ta nói về những nhận thức được hầu hết mọi người chấp nhận này thì cần phải hiểu đó là nguồn nhân lực có tri thức, có kỹ năng ở trình độ cao, biết lao động sáng tạo chứ không phải sức lao động cơ bắp dựa trên kinh nghiệm. Lực lượng lao động xã hội đã có sự chuyển biến rõ rệt từ những công nhân “cổ xanh” là chủ yếu thành những công nhân “cổ trắng” là chủ yếu.  Peter Drucker (1993)-một chuyên gia hàng đầu của lý luận quản lý- đã nhận xét rằng: “Trong thời kỳ 1880, khoảng chín phần mười số người lao động là lao động chân tay; ngày nay, con số này giảm xuống một phần năm. Bốn phần năm lực lượng lao động là những người lao động tri thức”.

Bandwidth, Network and Servers Monitoring tools with Installation Tutorials

Nagios

Nagios is a host and service monitor designed to inform you of network problems before your clients, end-users or managers do. It has been designed to run under the Linux operating system, but works fine under most *NIX variants as well. The monitoring daemon runs intermittent checks on hosts and services you specify using external "plugins" which return status information to Nagios. When problems are encountered, the daemon can send notifications out to administrative contacts in a variety of different ways (email, instant message, SMS, etc.). Current status information, historical logs, and reports can all be accessed via a web browser.

Installation and Configuration

http://www.debianhelp.co.uk/nagios.htm
Oreon

Oreon© is an Open Source monitoring solution based on Nagios. It offers to this monitoring standard a new front end and brings it a panel of new functionalities.

Installation and Configuration

The services of Centos

Stop unnecessary services for your system which are enabled on the default settings

NetworkManager	The NetworkManager daemon attempts to keep an active network connection available at all times.
acpid	Advanced Configuration and Power Interface event daemon.
anacron	Anacron can be used to execute commands periodically, with a frequency specified in days.
apmd	Advanced Power Management (APM) BIOS utilities for laptops.
atd	atd runs jobs queued by at.
auditd	The audit package contains the user space utilities for storing and searching the audit records generate by the audit subsystem in the Linux 2.6 kernel.	*
autofs	autofs controls the operation of the automount(8) daemons running on the Linux system.
avahi-daemon	Avahi mDNS/DNS-SD daemon Avahi is a fully LGPL framework for Multicast DNS Service Discovery.
avahi-dnsconfd	avahi-dnsconfd is a small daemon which may be used to configure conventional DNS servers using mDNS in a DHCP-like fashion.
bluetooth	It provids wireless connections among computers.
conman	ConMan is a serial console management program designed to support a large number of console devices and simultaneous users.
cpuspeed	This program monitors the systemfs idle percentage and reduces or raises the CPUsf clock speeds and voltages accordingly to minimize power consumption when idle and maximize perfor-mance when needed.
crond	The daemon to execute scheduled commands.	*
cups	It's the print system.
dund	It's BlueZ Bluetooth dial-up networking daemon.
firstboot	It's a tool that we can configure basic settings ofthe system by it.
gpm	It's a cut and paste utility and mouse server for virtual consoles.
haldaemon	It searches infomations for hardwares.
hidd	It's Bluetooth HID daemon.
ip6tables	It's IPv6 packet filter administration.
iptables	It's administration tool for IPv4 packet filtering and NAT.
irda	IrDA is a complete implementation of the various IrDA protocols and IrDA drivers for Linux.
irqbalance	It distributes hardware interrupts across processors on a multiprocessor system.	*
kudzu	It detects and configures new and/or changed hardware on a system.
lvm2-monitor	Monitor LVM2 with using dmeventd.
mcstrans	It's the daemon for SELinux.
mdmonitor	It watches software-based RAID.
mdmpd	It watches software-based RAID.
messagebus	It sends messages between apprications.	*
microcode_ctl	It's microcode utility for Intel IA32 processors.
multipathd	Manage kernel's function called DeviceMapper.
netfs	It's NFS client.
netplugd	It's the daemon for network cable hotplug management.
network	It's the daemon for network system.	*
nfs	It's NFS server.
nfslock	It provids file lock function for NFS server.
nscd	Nscd is a daemon that provides a cache for the most common name service requests.
oddjobd	The oddjobd daemon provides the com.redhat.oddjob service on the system-wide message bus.
pand	The pand PAN daemon allows your computer to connect to ethernet networks using Bluetooth.
pcscd	It's PC/SC Smart Card Daemon.
portmap	Portmap is a server that converts RPC program numbers into DARPA protocol port numbers.
psacct	PSACCT is a standard process running on each node that generates daily usage logs containing information on the jobs that ran and how many resources they consumed.
rawdevices	The rawdevices is allocated in the block device.
rdisc	Detect routers in local subnet.
readahead_early	It reads files in page cache early.
readahead_later	It reads files in page cache early when system is running in GUI mode.
restorecond	It's the daemon that watches for file creation and then sets the default SELinux file context.
rpcgssd	It's the daemon which is used for network filesystem like NIS or NFS.
rpcidmapd	It's the daemon which is used for network filesystem like NIS or NFS.
rpcsvcgssd	It's the daemon which is used for network filesystem like NIS or NFS.
saslauthd	saslauthd is a daemon process that handles plaintext authentication requests on behalf of the SASL library.
sendmail	It's SMTP server.
smartd	It's SMART Disk Monitoring Daemon.
sshd	It's OpenSSH SSH daemon.	*
syslog	It reads and/or clears kernel message ring buffer; set console_loglevel.	*
tcsd	TrouSerS server daemon
wpa_supplicant	Provide IEEE 802.1x authentication.
xfs	It's X fonts server.
ypbind	ypbind finds the server for NIS domains and maintains the NIS binding information.
yum-updatesd	yum-updatesd provides notification of updates which are available to be applied to your system.