How to get the current date in a shell script?
The date command is part of the Linux Coreutils package. This tutorial will help you get the current date and time in a shell script. The simple date command returns the current date and time with the current time zone set on your system. You can also store the output of the command in a variable for later use.
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How to set system date in Linux?
You can use the date to set the system date. The GNU date implementation (as found on most non-embedded Linux-based systems) accepts many different formats for setting the time, here are some examples: Now the system time is set, but you may want to sync it with the hardware clock : The command to change the system date is date.
How do you use the date command in Bash?
You can simply use the date command within the shell script similar to use at the command prompt. Create a getDateTime.sh bash script with the following content. Now run the script from the command line and look at the output. You can find all the available options of the date command using the –help parameter. You will find the result as below with some more options.
What is the correct syntax for date in shell?
The preferred syntax in any POSIX-compliant shell in this millennium is date=$(date) instead of date=`date`. Also, don’t use uppercase for your private variables; Uppercase variable names are reserved for the system. — triple on 26 sep.
How to do arithmetic in a shell script?
In the shell script, all variables have a string value, even if they are numbers. So, to perform arithmetic operations we use the expr command. The expr command can only work with integer values. For floating point numbers we use the bc command. To calculate the result we enclose the expression in backticks ` ` .
How to do date arithmetic in Linux shell?
For BSD/OS X compatibility, you can also use the date utility with -j and -v to do date calculations. Check the FreeBSD man page for the date. You can combine the above Linux answers with this answer which might give you enough support.
How to print current date in Linux shell?
Prints the current date and time to the Unix shell script. To store the current date and time in a variable, enter: Print current date on Unix. To print this date, use the printf or echo: statement, or use the printf: Get current date and time command in the Linux shell script. You can format and display the date using the following syntax:
How to display current time in Linux shell?
How can I display current time in Linux shell script? #!/bin/bash now = “$ (date)” printf “Current date and time %s ” “$now” now = “$ (date +’%d/%m/%Y’)” printf “Current date in format dd/mm/yyyy %s ” “$now” echo “Starting backup at $now, please wait…”
To fix this, you’ll need to revert your date command to a GNU version of date using the -d option, which will take an existing date as input. Note: I had to use gdate for this to work on my system (OS X).