...readonly variable$ TEST="New" #会发现此也变量不能被修改-bash: TEST: readonly variable环境变量的设置位于/etc/profile文件如果需要增加新的环境变量可以添加下属行...2.设置变量的三种方法 2.1 在/etc/profile文件中添加变量【对所有用户生效(永久的)】 用VI在文件/etc/profile文件中增加变量,该变量...
This is the syntaxforhere documentandit willcontinueuntil it encounters a EOF in the first line. This iscaseofdoublequote so variable value will be interpolated. For example value of a =$aEOFprint"$var\n";$var= <<'EOF'; This iscaseof single quote so variable value will be interpolated....
; sub PrintHello { # Private variable for PrintHello function local $string; $string = "Hello, Perl!"; PrintMe(); print "Inside the function PrintHello $string\n"; } sub PrintMe { print "Inside the function PrintMe $string\n"; } # Function call PrintHello(); print "Outside the ...
How do I add a directory to my include path (@INC) at runtime? Here are the suggested ways of modifying your include path, including environment variables, run-time switches, and in-code statements: thePERLLIBenvironment variable $ export PERLLIB=/path/to/my/dir $ perl program.pl thePERL...
With an environment variable, I don’t have to edit the use of the program in other programs. My changes can last for as little as a single use by setting the environment variable when I run the program: $ DEBUG=1 ./program.pl or for the rest of the session when I set the ...
t/00podcover.t ... skipped: Set environment variable PERL_TEST_POD=1 to test POD t/01basic.t ... ok t/02parsedistname.t .. ok t/03merge_meta.t ... PAR::Dist testers/debug info: Using 'Parse::CPAN::Meta' as YAML implementation at /home/software/PAR-Dist-0.48/blib/lib/PAR/...
If running under a Bourne-style shell, you can set the environment variable for only the duration of a single command: panic% MOD_PERL_TRACE=all ./httpd -X If using a different shell, you should try using the env utility, which has a similar effect: panic% env MOD_PERL_TRACE=all ....
If you need to set it to somewhere else because, say, your HOME has limited quota, you can do that by setting PERLBREW_ROOT environment variable before running the installer: export PERLBREW_ROOT=/opt/perl5 curl -L https://install.perlbrew.pl | bash As a result, different users on the...
Try installing the Devel::CoreStack module to get a stack trace. If the stack trace mentions XS_DynaLoader_dl_load_file then rerun make test after setting the environment variable PERL_DL_DEBUG to 2. If your installation succeeds, but your script does not behave as you expect, the problem...
If instead of the recommended GNU make you would like to use the system supplied make program then be sure to install the default rules file properly via the shell command: cp /samples/startup.mk /etc and be sure to also set the environment variable _C89_CCMODE=1 (exporting _C89_CC...