nohup VERBOSE=1 perl script.pl

问题:

I have a perl script for which ENV variables can be set to direct specific outputs e.g. $debug, $verbose, $develop etc

Usually I run these from the command line

$ VERBOSE=1 perl myperlscript.pl params

I now want to run them using nohup. Using the command line

$ nohup VERBOSE=1 perl myperlscript.pl params 

is clearly not right, as the attempt to set ENV{VERBOSE} is interpreted as a param to nohup & I get the msg

nohup: failed to run command `VERBOSE=1': No such file or directory

What IS the correct syntax here? I'm trying to run this on a linux box.

回答1:

Set the environment variable before calling nohup, and it will be preserved when nohup exec()s (replaces itself with) perl.

$ VERBOSE=1 nohup perl myscript.pl params ...

回答2:

This is exactly what the env command is for:

$ env VAR1=VAL1 VAR2=VAL2 nohup perl myperlscript.pl params &

回答3:

Try to combine all commands into shell script and run it like that: nohup /path/to/script.sh

Or you could use export: export VERBOSE=1 And then: nohup perl myperlscript.pl params