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"CentOS ntp 설치"의 두 판 사이의 차이

잔글 (봇: 자동으로 텍스트 교체 (-source +syntaxhighlight))
 
(사용자 3명의 중간 판 25개는 보이지 않습니다)
1번째 줄: 1번째 줄:
{{소문자}}
{{테스트|CentOS 6}}
{{테스트|CentOS 6}}
;ntp 설치
;CentOS ntp 설치


==설치 확인==
==확인==
;설치 안됨
<syntaxhighlight lang='console'>
<source lang='dos'>
[root@zetawiki ~]# rpm -qa ntp
[root@jmnote ~]# rpm -qa ntp*
[root@zetawiki ~]# yum list ntp
</source>
... (생략)
 
Available Packages
;설치됨
ntp.x86_64                   4.2.6p5-5.el6.centos.4                    updates
<source lang='dos'>
</syntaxhighlight>
[root@jmnote ~]# rpm -qa ntp*
:→ updates 저장소를 통해 설치가능
ntpdate-4.2.4p8-2.el6.centos.x86_64
ntp-4.2.4p8-2.el6.centos.x86_64
</source>


==설치==
==설치==
<source lang='dos'>
<syntaxhighlight lang='console'>
[root@jmnote ~]# yum install ntp -y
[root@zetawiki ~]# yum install ntp
Loaded plugins: fastestmirror
... (생략)
Loading mirror speeds from cached hostfile
================================================================================
Setting up Install Process
  Package       Arch         Version                         Repository     Size
Resolving Dependencies
================================================================================
--> Running transaction check
---> Package ntp.x86_64 0:4.2.4p8-2.el6.centos will be installed
--> Processing Dependency: ntpdate = 4.2.4p8-2.el6.centos for package: ntp-4.2.4p8-2.el6.centos.x86_64
--> Running transaction check
---> Package ntpdate.x86_64 0:4.2.4p8-2.el6.centos will be installed
--> Finished Dependency Resolution
 
Dependencies Resolved
 
===========================================================================================
  Package           Arch             Version                           Repository     Size
===========================================================================================
Installing:
Installing:
  ntp               x86_64           4.2.4p8-2.el6.centos             Daum          444 k
  ntp           x86_64       4.2.6p5-5.el6.centos.4          updates      595 k
Installing for dependencies:
Installing for dependencies:
  ntpdate           x86_64           4.2.4p8-2.el6.centos             Daum            58 k
  ntpdate       x86_64       4.2.6p5-5.el6.centos.4          updates        77 k


Transaction Summary
Transaction Summary
===========================================================================================
================================================================================
Install      2 Package(s)
Install      2 Package(s)


Total download size: 501 k
Total download size: 672 k
Installed size: 1.2 M
Installed size: 1.7 M
Downloading Packages:
Is this ok [y/N]: y
(1/2): ntp-4.2.4p8-2.el6.centos.x86_64.rpm                          | 444 kB    00:00   
</syntaxhighlight>
(2/2): ntpdate-4.2.4p8-2.el6.centos.x86_64.rpm                      |  58 kB    00:00   
<syntaxhighlight lang='console'>
-------------------------------------------------------------------------------------------
... (생략)
Total                                                      571 kB/s | 501 kB    00:00   
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : ntpdate-4.2.4p8-2.el6.centos.x86_64                                    1/2
  Installing : ntp-4.2.4p8-2.el6.centos.x86_64                                        2/2
  Verifying  : ntp-4.2.4p8-2.el6.centos.x86_64                                        1/2
  Verifying  : ntpdate-4.2.4p8-2.el6.centos.x86_64                                    2/2
 
Installed:
Installed:
   ntp.x86_64 0:4.2.4p8-2.el6.centos                                                      
   ntp.x86_64 0:4.2.6p5-5.el6.centos.4                                                               


Dependency Installed:
Dependency Updated:
   ntpdate.x86_64 0:4.2.4p8-2.el6.centos                                                  
   ntpdate.x86_64 0:4.2.6p5-5.el6.centos.4                                                           


Complete!
Complete!
</source>
</syntaxhighlight>
 
==확인 2==
<syntaxhighlight lang='console'>
[root@zetawiki ~]# rpm -qa ntp
ntp-4.2.6p5-5.el6.centos.4.x86_64
</syntaxhighlight>


==설치 위치==
==설치 위치 확인==
<source lang='dos'>
<syntaxhighlight lang='console'>
[root@localhost ~]# whereis ntp
[root@zetawiki ~]# whereis ntp
ntp: /etc/ntp /etc/ntp.conf
ntp: /etc/ntp /etc/ntp.conf
[root@localhost ~]# which ntpq
[root@zetawiki ~]# which ntpq
/usr/sbin/ntpq
/usr/sbin/ntpq
[root@localhost ~]# which ntpdate
[root@zetawiki ~]# which ntpdate
/usr/sbin/ntpdate
/usr/sbin/ntpdate
[root@localhost ~]# which ntpd
[root@zetawiki ~]# which ntpd
/usr/sbin/ntpd
/usr/sbin/ntpd
[root@localhost ntp]# service ntpd status
[root@zetawiki ~]# service ntpd status
ntpd is stopped
ntpd is stopped
</source>
</syntaxhighlight>
*설정파일 ntp.conf는 /etc에 있다.
*설정파일 ntp.conf는 /etc에 있다.
*ntpq, ntpdate, ntpd는 /usr/sbin에 있다.
*ntpq, ntpdate, ntpd는 /usr/sbin에 있다.
87번째 줄: 67번째 줄:


==동기화 서버 설정==
==동기화 서버 설정==
<source lang='bash'>
{{참고|공용 ntp 서버 목록}}
echo 1.kr.pool.ntp.org > /etc/ntp.conf
{{참고|/etc/ntp.conf}}
echo 1.asia.pool.ntp.org >> /etc/ntp.conf
<syntaxhighlight lang='bash'>
echo 2.asia.pool.ntp.org >> /etc/ntp.conf
service ntpd start
chkconfig ntpd on
chkconfig ntpd on
echo driftfile /var/lib/ntp/drift > /etc/ntp.conf
echo restrict default kod nomodify notrap nopeer noquery >> /etc/ntp.conf
echo restrict -6 default kod nomodify notrap nopeer noquery >> /etc/ntp.conf
echo restrict 127.0.0.1 >> /etc/ntp.conf
echo restrict -6 ::1 >> /etc/ntp.conf
echo server 1.kr.pool.ntp.org >> /etc/ntp.conf
echo server 1.asia.pool.ntp.org >> /etc/ntp.conf
echo server 2.asia.pool.ntp.org >> /etc/ntp.conf
echo includefile /etc/ntp/crypto/pw >> /etc/ntp.conf
echo keys /etc/ntp/keys >> /etc/ntp.conf
service ntpd restart
ntpq -p
ntpq -p
</source>
</syntaxhighlight>


==즉시 동기화==
==즉시 동기화==
;명령어
;명령어
<source lang='bash'>
<syntaxhighlight lang='bash'>
ntpdate 서버주소
ntpdate 서버주소
</source>
</syntaxhighlight>


;실행 예시
;실행 예시
<source lang='dos'>
<syntaxhighlight lang='console'>
[root@localhost ntp]# ntpdate time.windows.com
[root@zetawiki ~]# ntpdate time.windows.com
</source>
</syntaxhighlight>
 
==차이 보기==
;명령어
<syntaxhighlight lang='bash'>
ntpdate -d 서버주소
</syntaxhighlight>
 
;실행 예시
<syntaxhighlight lang='console'>
[root@zetawiki ~]# ntpdate -d time.windows.com
2 Oct 02:08:06 ntpdate[3166]: ntpdate 4.2.4p8@1.1612-o Tue Nov 29 00:09:13 UTC 2011 (1)
Looking for host time.windows.com and service ntp
host found : wwwco1test13.microsoft.com
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
server 65.55.21.21, port 123
stratum 2, precision -6, leap 00, trust 000
refid [65.55.21.21], delay 0.19615, dispersion 0.00293
transmitted 4, in filter 4
reference time:    d4144c6a.71b59070  Tue, Oct  2 2012  2:07:54.444
originate timestamp: d4144c77.e83cbb72  Tue, Oct  2 2012  2:08:07.907
transmit timestamp:  d4144c77.cca0c88c  Tue, Oct  2 2012  2:08:07.799
filter delay:  0.22122  0.19688  0.19693  0.19615
        0.00000  0.00000  0.00000  0.00000
filter offset: 0.010714 0.029665 0.029863 0.030388
        0.000000 0.000000 0.000000 0.000000
delay 0.19615, dispersion 0.00293
offset 0.030388
 
2 Oct 02:08:07 ntpdate[3166]: adjust time server 65.55.21.21 offset 0.030388 sec
</syntaxhighlight>
:→ 마지막 offset 값이 양수이면 로컬서버가 늦는 것, 음수이면 로컬서버가 빠른 것.
:→ 로컬 서버가 약 0.03초 늦다.


==같이 보기==
==같이 보기==
*[[우분투 ntp 설치]]
*[[/etc/init.d/ntpd]]
*[[/etc/init.d/ntpd]]
*[[/etc/ntp.conf]]
*[[/etc/ntp.conf]]
113번째 줄: 143번째 줄:
*[[ntpdate]]
*[[ntpdate]]
*[[공용 ntp 서버 목록]]
*[[공용 ntp 서버 목록]]
*[[리눅스 시간 맞는지 확인]]


[[분류:리눅스]]
[[분류:리눅스]]
[[분류: /usr/sbin]]
[[분류: /usr/sbin]]
[[분류: NTP]]
[[분류: NTP]]

2020년 11월 2일 (월) 00:55 기준 최신판

CentOS ntp 설치

1 확인[ | ]

[root@zetawiki ~]# rpm -qa ntp
[root@zetawiki ~]# yum list ntp
... (생략)
Available Packages
ntp.x86_64                    4.2.6p5-5.el6.centos.4                     updates
→ updates 저장소를 통해 설치가능

2 설치[ | ]

[root@zetawiki ~]# yum install ntp
... (생략)
================================================================================
 Package       Arch         Version                         Repository     Size
================================================================================
Installing:
 ntp           x86_64       4.2.6p5-5.el6.centos.4          updates       595 k
Installing for dependencies:
 ntpdate       x86_64       4.2.6p5-5.el6.centos.4          updates        77 k

Transaction Summary
================================================================================
Install       2 Package(s)

Total download size: 672 k
Installed size: 1.7 M
Is this ok [y/N]: y

... (생략)
Installed:
  ntp.x86_64 0:4.2.6p5-5.el6.centos.4                                                                

Dependency Updated:
  ntpdate.x86_64 0:4.2.6p5-5.el6.centos.4                                                            

Complete!

3 확인 2[ | ]

[root@zetawiki ~]# rpm -qa ntp
ntp-4.2.6p5-5.el6.centos.4.x86_64

4 설치 위치 확인[ | ]

[root@zetawiki ~]# whereis ntp
ntp: /etc/ntp /etc/ntp.conf
[root@zetawiki ~]# which ntpq
/usr/sbin/ntpq
[root@zetawiki ~]# which ntpdate
/usr/sbin/ntpdate
[root@zetawiki ~]# which ntpd
/usr/sbin/ntpd
[root@zetawiki ~]# service ntpd status
ntpd is stopped
  • 설정파일 ntp.conf는 /etc에 있다.
  • ntpq, ntpdate, ntpd는 /usr/sbin에 있다.
  • ntpd는 중지된 상태이다.

5 동기화 서버 설정[ | ]

공용 ntp 서버 목록 문서를 참고하십시오.
/etc/ntp.conf 문서를 참고하십시오.
chkconfig ntpd on
echo driftfile /var/lib/ntp/drift > /etc/ntp.conf
echo restrict default kod nomodify notrap nopeer noquery >> /etc/ntp.conf
echo restrict -6 default kod nomodify notrap nopeer noquery >> /etc/ntp.conf
echo restrict 127.0.0.1 >> /etc/ntp.conf
echo restrict -6 ::1 >> /etc/ntp.conf
echo server 1.kr.pool.ntp.org >> /etc/ntp.conf
echo server 1.asia.pool.ntp.org >> /etc/ntp.conf
echo server 2.asia.pool.ntp.org >> /etc/ntp.conf
echo includefile /etc/ntp/crypto/pw >> /etc/ntp.conf
echo keys /etc/ntp/keys >> /etc/ntp.conf
service ntpd restart
ntpq -p

6 즉시 동기화[ | ]

명령어
ntpdate 서버주소
실행 예시
[root@zetawiki ~]# ntpdate time.windows.com

7 차이 보기[ | ]

명령어
ntpdate -d 서버주소
실행 예시
[root@zetawiki ~]# ntpdate -d time.windows.com
 2 Oct 02:08:06 ntpdate[3166]: ntpdate 4.2.4p8@1.1612-o Tue Nov 29 00:09:13 UTC 2011 (1)
Looking for host time.windows.com and service ntp
host found : wwwco1test13.microsoft.com
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
receive(65.55.21.21)
transmit(65.55.21.21)
server 65.55.21.21, port 123
stratum 2, precision -6, leap 00, trust 000
refid [65.55.21.21], delay 0.19615, dispersion 0.00293
transmitted 4, in filter 4
reference time:    d4144c6a.71b59070  Tue, Oct  2 2012  2:07:54.444
originate timestamp: d4144c77.e83cbb72  Tue, Oct  2 2012  2:08:07.907
transmit timestamp:  d4144c77.cca0c88c  Tue, Oct  2 2012  2:08:07.799
filter delay:  0.22122  0.19688  0.19693  0.19615 
         0.00000  0.00000  0.00000  0.00000 
filter offset: 0.010714 0.029665 0.029863 0.030388
         0.000000 0.000000 0.000000 0.000000
delay 0.19615, dispersion 0.00293
offset 0.030388

 2 Oct 02:08:07 ntpdate[3166]: adjust time server 65.55.21.21 offset 0.030388 sec
→ 마지막 offset 값이 양수이면 로컬서버가 늦는 것, 음수이면 로컬서버가 빠른 것.
→ 로컬 서버가 약 0.03초 늦다.

8 같이 보기[ | ]

원본 주소 "https://zetawiki.com/w/index.php?title=CentOS_ntp_설치&oldid=604579"
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