Date and Time Configuration in RHEL7
This tutorial is all about date and time management in RHEL7 and CentOS7.I have mentioned step wise notes on how to see,change date and time in RHEL7 or Centos7. I have also mentioned about hardware clock and system clock along with NTP Server and vice versa. Basically this tutorial is all about every kind of time configuration along with date in RHEL7 and Centos7.
How to see Date and Time in RHEL7 or CentOS 7 in detail.
[root@localhost ~]# timedatectl Local time: Sat 2018-02-24 11:20:26 EST Universal time: Sat 2018-02-24 16:20:26 UTC RTC time: Sat 2018-02-24 16:20:29 Time zone: America/New_York (EST, -0500) NTP enabled: yes NTP synchronized: yes RTC in local TZ: no DST active: no Last DST change: DST ended at Sun 2017-11-05 01:59:59 EDT Sun 2017-11-05 01:00:00 EST Next DST change: DST begins (the clock jumps one hour forward) at Sun 2018-03-11 01:59:59 EST Sun 2018-03-11 03:00:00 EDT [root@localhost ~]#
How to Change Current Time in RHEL7/CentOS7
[root@localhost ~]# timedatectl set-time 21:55:20
How to set the current date in RHEL7 and CentOS7
[root@localhost ~]# timedatectl set-date 2018:02:24
How to set the local rtc in RHEL7 and CentOS7
[root@localhost ~]# timedatectl set-local-rtc yes
In Rhel 7 suppose you want to set the UTC, how will you do?
[root@localhost ~]# timedatectl set-local-rtc no
In Rhel 7 suppose you want to display the current date how will you do ?
[root@localhost ~]# timedatectl set-time YYYY-MM-DD
How to display the timezones in RHEL7 and CentOS7
[root@localhost ~]# timedatectl set-ntp yes
How to set the timezone in RHEL7/CentOS7
[root@localhost ~]# timedatectl set-timezone timezone-name
How to synchronize the time with remote server in RHEL7/CentOS7
[root@localhost ~]# timedatectl set-ntp yes
What if you don’t want to synchronize the time with the remote server in RHEL7/CentOS7?
[root@localhost ~]# timedatectl set-ntp no
How to synchronize the time from hardware clock to the system clock or vice versa in RHEL7 and CentOS7?
[root@localhost ~]# hwclock -s [root@localhost ~]# hwclock -w
What is the name of the file where hardware clock information is stored inside RHEL7?
[root@localhost ~]# cat /etc/adjtime 0.000000 1519491188 0.000000 1519491188 UTC
How to display the current hardware date and time in RHEL7 and CentOS7?
[root@localhost ~]# hwclock Sat 24 Feb 2018 11:54:00 AM EST -0.556452 seconds [root@localhost ~]#
How to set the hardware date and time in RHEL7 and Centos7?
[root@localhost ~]# hwclock --set --date “dd mmm yyyy HH:MM"
Learn Linux CCNA CEH IPv6 Cyber-Security Online 