![\"\"](\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/2\/2022\/11\/Linux-cheat-sheet.png\/public\")
<\/a><\/figure><\/div>\n\n\n
Important!<\/strong> CentOS Linux 8 has reached it’s End of Lifetime (EOL) on 2021-12-31. While CentOS Linux 7 is still supported, it will reach EOL on 2024-06-30. We recommend keeping that in mind when choosing this OS. You can read more about it in their official website<\/a>.<\/p><\/div>\n\n\n\n<\/p> First of all, we need to access our virtual private server using SSH. If you’re having trouble, reference the PuTTY tutorial<\/a>!<\/p> You can check your current time zone by using the date<\/strong> command as shown below:<\/p> This will output the time in the following format:<\/p> Alternatively, you can use the timedatectl<\/strong> command. This command can:<\/p> The basic command looks like this:<\/p> The output will be as shown below:<\/p> This contains information such as local time, universal time, and timezone.<\/p> Once you have viewed your current timezone, you might want to list all the available timezone options. The below command can be used to list all the timezone options:<\/p> You’ll get a long list showing all the timezones in alphabetical order. You can refine your search by adding filters using grep<\/a> patterns. One such example is as shown below:<\/p> Once you have the list of timezones, you can set the one you prefer. To set the timezone in CentOS 7, you can use:<\/p> You can replace the time zone accordingly in the command above. Over here we can also set a specific time and date. This can be done using the below format:<\/p> For instance, if you want this to be set the time as Mar-16-2019 and the current time as 09:20:00, then you can use:<\/p> After making these changes, you can again check the time zone details using timedatectl<\/strong>.<\/p> A hardware clock is different from the system clock which is managed by the Linux kernel. This is also referred to as the BIOS clock. The hardware clock is enabled once the system is shut down. Using Linux commands, you can set the hardware clock.<\/p> To check if the hardware clock is set to local time zone use the below command:<\/p> This will give output as shown below, which means the hardware clock does not have a timezone specified:<\/p> Next, you can set your hardware clock to local time zone using the below command:<\/p> If you're seeing the error \"Failed to set local RTC: Failed to set RTC to local\/UTC: Input\/output error\" when trying to run this command, try editing the file \/etc\/adjtime\/ by adjusting the third line. You can read more about this error over at Stack Overflow<\/a>.<\/p>\n <\/div>\n\n\n\n<\/p> To revert the changes, you can use:<\/p> Network Time Protocol (NTP) is an internet protocol which is commonly used to synchronize system clocks on different computers. The timedatectl command can configure a system’s time zone to automatically sync with a remote server using NTP.<\/p> To enable this, first, we should have NTP installed on the system. If you don’t have this installed on your CentOS device yet, you can do so by installing Chrony<\/a>:<\/p> In order to start synchronization with a remote NTP server use the below command:<\/p> In case you want to revert these changes, use the below command. This will disable time synchronization:<\/p> Here we have seen how to set timezone on CentOS 7 as well as how to set system time, date, hardware clock time and synchronize systems using NTP. Setting the right timezone is important for correct logging, automated processes and more!<\/p> It’s easy to set the timezone on CentOS 7. And yes, to learn about more options, you can always check the manual pages for the timedatectl command.<\/p> How to Change Hostname on CentOS<\/a> While you are setting up a new server, very often you might have to set the timezone. In certain cases, you might want to change your timezone. Setting the appropriate timezone on servers is something many of us forget. Setting an inappropriate timezone will impact your server reporting and logs. That’s why in this tutorial, […]<\/p>\nHow to Check the Set Timezone in CentOS 7<\/h2>
date<\/pre>
Fri Mar 15 14:52:20 UTC 2019<\/pre>
\n
timedatectl<\/pre>
Local time: Fri 2019-03-15 14:54:51 UTC\n Universal time: Fri 2019-03-15 14:54:51 UTC\n RTC time: n\/a\n Time zone: Host (UTC, +0000)\n NTP enabled: n\/a\nNTP synchronized: yes\nRTC in local TZ: no\n DST active: n\/a<\/pre>
How to List Timezones in CentOS 7<\/h2>
timedatectl list-timezones<\/pre>
timedatectl list-timezones | grep Pacific<\/pre>
How to Set Timezone in CentOS 7<\/h2>
timedatectl set-timezone America\/Chicago<\/pre>
timedatectl set-time 'YYYY-MM-DD HH:MM:SS'<\/pre>
timedatectl set-time '2019-03-16 09:20:00'<\/pre>
How to Set the Hardware Clock in CentOS 7<\/h2>
timedatectl | grep local<\/pre>
RTC in local TZ: no<\/pre>
timedatectl set-local-rtc 1<\/pre>
Pro Tip<\/h4>\n
timedatectl set-local-rtc 0<\/pre>
How to Perform Clock Synchronization on CentOS 7<\/h2>
yum install chrony<\/pre>
timedatectl set-ntp true<\/pre>
timedatectl set-ntp false<\/pre>
![\"\"](\"https:\/\/imagedelivery.net\/LqiWLm-3MGbYHtFuUbcBtA\/wp-content\/uploads\/sites\/2\/2023\/02\/VPS-hosting-banner.png\/public\")
<\/a><\/figure>Conclusion<\/h2>
Learn More About CentOS<\/h4>\n
\nHow to Install LAMP Stack on CentOS<\/a>
\nHow to Install Let's Encrypt SSL on CentOS<\/a>
\nHow to Disable Selinux on CentOS<\/a><\/p>\n <\/div>\n<\/p>\n","protected":false},"excerpt":{"rendered":"