[TOC]
command line calendar
cal
show the current month
cal -H 2015-05-06
show the current month and highlight a specific day
cal -m2
show the second month of the current year
cal -3
show the previous month, current month, and next month
cal 2015
show a whole year
Ubuntu Debian Date Time
date -s "14 DEC 2009 02:37:00"
sudo mv /etc/localtime /etc/localtime-old
sudo ln -sf /usr/share/zoneinfo/Europe/Amsterdam /etc/localtime
sudo ntpdate pool.ntp.org
synchronize time against the international time servers
/sbin/hwclock --systohc
hardware clock?
CentOS date and time
MANUAL ADJUSTMENT OF LINUX TIME FROM COMMAND LINE
date -s 2159
manually sets the time to 21:59
date -s 123021592009
this means December 30th, 21:59, 2009
yum install tzdata (this will get the 2009 edition)
tzselect (pretty easy command line menu to pick your current city)
nano /etc/sysconfig/clock
change it from Etc\GMT to Europe/London
ironically after the above and below fixes
service ntpd stop
chkconfig ntpd off
kernel parameters boot/grub/menu.lst
kernel divider=10 clocksource = acpi_pm
initrd
append="clock+pit"
ntp.conf
tinker panic 0 to prevent the local clock from acecssing...
comment out