hour update fedora ntp

1. install ntp
2. check config file /etc/ntp.conf
3. enable time service - systemctl enable ntpdate.service
4. start and check ntpdate service

[root@virt tomcat]# systemctl start ntpdate.service
[root@virt tomcat]#
[root@virt tomcat]#
[root@virt tomcat]#
[root@virt tomcat]# systemctl status ntpdate.service
● ntpdate.service - Set time via NTP
   Loaded: loaded (/usr/lib/systemd/system/ntpdate.service; enabled; vendor preset: disabled)
   Active: active (exited) since sob 2016-03-19 22:02:08 CET; 3s ago
  Process: 14231 ExecStart=/usr/libexec/ntpdate-wrapper (code=exited, status=0/SUCCESS)
 Main PID: 14231 (code=exited, status=0/SUCCESS)

mar 19 21:12:41 virt systemd[1]: Starting Set time via NTP...
mar 19 22:02:08 virt ntpdate[14239]: step time server 31.216.56.5 offset 2963.680015 sec
mar 19 22:02:08 virt systemd[1]: Started Set time via NTP.

[root@virt tomcat]# date
sob, 19 mar 2016, 22:02:15 CET

Display date on the terminal

Display Date on the Terminal

The below command is a combination of several commands, better say it a script. For a person working at shell or terminal, without GUI seeing current system date is tedious job. You have to type ‘date‘ command to check today’s date.
Just execute the below command on you prompt and see the date and time on the above right corner of terminal.

root@tecmint [~]# while sleep 1;do tput sc;tput cup 0 $(($(tput cols)-29));date;tput rc;done &

tecmint.com 

How to make fast ping

how to make fast ping

Normal:

[root@virt ~]# time ping -c 5 www.google.com
PING www.google.com (216.58.209.36) 56(84) bytes of data.
64 bytes from waw02s05-in-f36.1e100.net (216.58.209.36): icmp_seq=1 ttl=55 time=12.1 ms
64 bytes from waw02s05-in-f36.1e100.net (216.58.209.36): icmp_seq=2 ttl=55 time=10.7 ms
64 bytes from waw02s05-in-f36.1e100.net (216.58.209.36): icmp_seq=3 ttl=55 time=12.0 ms
64 bytes from waw02s05-in-f36.1e100.net (216.58.209.36): icmp_seq=4 ttl=55 time=11.5 ms
64 bytes from waw02s05-in-f36.1e100.net (216.58.209.36): icmp_seq=5 ttl=55 time=12.4 ms

--- www.google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 4032ms
rtt min/avg/max/mdev = 10.797/11.811/12.449/0.599 ms

real    0m4.067s
user    0m0.000s
sys    0m0.006s

Fast:

[root@virt ~]# time ping -c 5 -n -i 0.2 -W1 www.google.com
PING www.google.com (216.58.209.36) 56(84) bytes of data.
64 bytes from 216.58.209.36: icmp_seq=1 ttl=55 time=12.8 ms
64 bytes from 216.58.209.36: icmp_seq=2 ttl=55 time=10.2 ms
64 bytes from 216.58.209.36: icmp_seq=3 ttl=55 time=11.1 ms
64 bytes from 216.58.209.36: icmp_seq=4 ttl=55 time=11.4 ms
64 bytes from 216.58.209.36: icmp_seq=5 ttl=55 time=11.5 ms

--- www.google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 835ms
rtt min/avg/max/mdev = 10.212/11.428/12.862/0.855 ms

real    0m0.870s
user    0m0.000s
sys    0m0.017s