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How to get accurate timestamps in Bash with printf?
As noted by @Isaac, with date implementations that support %N like GNU’s or ast-open’s, you can use %s%3N to limit the precision, but except in ksh93 where date can be made to be the builtin version of ast-open’s date, the date command is not builtin.
How long does it take to print date in Bash?
It will take a few hundred if not thousand microseconds to start and a few more to print the date and return. bash did copy a subset of ksh93 printf ‘% (…)T’ format, but not the %N part.
How to create timestamp variable in bash script?
In order to get the current timestamp and not the time of when a fixed variable is defined, the trick is to use a function and not a variable: #!/bin/bash # Define a timestamp function timestamp () { date +”%T” # current time } # do something… timestamp # print timestamp # do something else… timestamp # print another timestamp # continue…
How to get the time format in Bash?
If you want to get the time it took to run a given command (pipeline), you can also use the time keyword, adjusting the format with $TIMEFORMAT in bash: Those time format directives initially come from csh (though bash, contrary to zsh or GNU time only supports a tiny subset).
How to print the date of a file in Bash?
For the line breaks i edited your code to get something with no line breaks. If file names have space (you can use the following command for file names with no spaces too, just it looks complicated/ugly than the former): This will display the date in 2 digits.
How to print current date in Linux shell?
Print current date and time in Unix shell script. To store current date and time to a variable, enter: Print Current Date in Unix. To print this date either use the printf or echo statement: OR use the printf command: Getting the current date and time in Linux shell script. You can format and display date using the following syntax:
How to convert date string to epoch in Bash?
This is how you would do it more simply on standard Linux system (as previously mentioned the date command would have to be adjusted for Mac Users) :
How to convert timestamps to dates in Bash?
The format for datefmt is a string accepted by strftime (3) (see man 3 strftime ). Here %c is: %c The preferred date and time representation for the current locale. Now if you want a script that accepts an argument and, if none is provided, reads stdin, you can proceed as: