Linux \ Unix Date Commands

 

Unix \ Linux  DateCommands

1. Date: This command is used to display the current system date

2. Day can be used in different format, below are a few format examples 

• Date “+%y-%m-%d”
• Date “+%m-%m-%y”
• Date “+%y-%m-%d %A”
• Date “+%y-%m-%d%A%B”
  

3. Date Formatting options, to format the date output, we can use "control characters" followed by a + sign. Format controls begin with the % symbol and are substituted by their current values to dispay required date format.

• %D -- Display date as mm/dd/yy
• %Y -- Year (e.g., 2022)
• %m -- Month (01-12)
• %B -- Long month name (e.g., October)
• %b -- Short month name (e.g., Oct)
• %d -- Day of month (e.g., 01)
• %j -- Day of year (001-366)
• %u -- Day of week (1-7)
• %A -- Full weekday name (e.g., Sunday)
• %a -- Short weekday name (e.g., Sun)
• %H -- Hour (00-23)
• %I -- Hour (01-12)
• %M -- Minute (00-59)
• %S -- Second (00-60)

4. Cal:  To view calendar of current month

5. Change Linux Server Date: 

• It is used to change the system clock manually.
• Please use date --set command. 
• For example, to set the date and time to 5:30 PM, May 13, 2010, type:
• date --set="20220514 05:30"
• Note: Manual setting the clock in Linux should not be implemented on production without client approval.

6. Display Future/past Dates: 

• "--date" option is used to display past dates in Linux. 
• It accepts parameter values such as "tomorrow", "Monday", "last Monday", "next Monday", "next week", and similar.