How do I get seconds in bash?
The ‘date’ command provides the option to display the time in seconds since Epoch(1970-01-01 00:00:00 UTC). Use the FORMAT specifier ‘%s’ to display the value. To get the full list of format specifies for date type ‘man date’ on the command line.
How do I get seconds in Unix?
To find the unix current timestamp use the %s option in the date command. The %s option calculates unix timestamp by finding the number of seconds between the current date and unix epoch. You will get a different output if you run the above date command.
How to pass environment variable to bash script?
A bash function f defined in another script scr2.sh and then have f available for calling at the command line, but not leaving a trace of what I did with REMOTE_SERVER. For instance, I want (actually, if REMOTE_SERVER was set before using f, I want it to keep that value). I couldn’t attain this last objective.
How to set environment variables in a shell?
Environment variables are not specific to interactive shells. This answer solved his problem. You need to run the script as source or the shorthand . This will run within the existing shell, ensuring any variables created or modified by the script will be available after the script completes.
How to set the current time in Bash?
You could also set the variable’s value with. printf -v NOW ‘% (%F_%H:%M:%S)T’ -1. if you’re using bash release 4.2 or later. This prints the timestamp directly into the variable without calling date. In the script that you are showing, the variable NOW is being set when the script is run (this is what you want).
What happens if you don’t change the now variable in Bash?
If you don’t, and later change how you define NOW so that it includes spaces or wildcards (filename globbing patterns), the commands that use $NOW may fail to parse their command line properly. About backticks in command substitutions: Have backticks (i.e. `cmd`) in *sh shells been deprecated?