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Java Forum / First Aid / March 2004use java and co by its name
I have j2sdk for linux. I am not able to execute javac, java and others by their names. To execute them, I need to do ./javac to compile the program. Can't I execute them just by using their names. regards, vz. > I have j2sdk for linux. I am not able to execute javac, java and > others by their names. To execute them, I need to do ./javac to > compile the program. Can't I execute them just by using their names. > > regards, > vz. Hi, That is a Linux related issue, not java. Try comp.os.linux.help to get a few pointers. Regards, Erwin Moller > I have j2sdk for linux. I am not able to execute javac, java and > others by their names. To execute them, I need to do ./javac to > compile the program. Can't I execute them just by using their names. Yes, but they have to be in your *search path* for your shell to find them. If you're using BASH, then add the following to your ~/.bashrc file: JAVA_HOME=[the directory where you have Java installed] PATH=$PATH:$JAVA_HOME/bin export JAVA_HOME PATH  SignatureDarryl L. Pierce <mcpierce@myrealbox.com> Visit the Infobahn Offramp - <http://mypage.org/mcpierce> "What do you care what other people think, Mr. Feynman?" > > I have j2sdk for linux. I am not able to execute javac, java and > > others by their names. To execute them, I need to do ./javac to [quoted text clipped - 7 lines] > > export JAVA_HOME PATH Also, try adding "." to your path. That will allow you to run progs in your current directory. >> > I have j2sdk for linux. I am not able to execute javac, java and >> > others by their names. To execute them, I need to do ./javac to [quoted text clipped - 11 lines] > Also, try adding "." to your path. That will allow you to run progs in > your current directory. NO! BAD MOJO! Never add the current directory indicator to your search path. SignatureDarryl L. Pierce <mcpierce@myrealbox.com> Visit the Infobahn Offramp - <http://mypage.org/mcpierce> "What do you care what other people think, Mr. Feynman?" > >> > I have j2sdk for linux. I am not able to execute javac, java and > >> > others by their names. To execute them, I need to do ./javac to [quoted text clipped - 13 lines] > > NO! BAD MOJO! Never add the current directory indicator to your search path. Why? >>>Also, try adding "." to your path. That will allow you to run progs in >>>your current directory. >> >>NO! BAD MOJO! Never add the current directory indicator to your search path. > > Why? Because it's a bad thing to do. :-) It can hide things that are happening. It can make situations harder to reproduce. Lot's of other things. Usually it's only Windows systems that have "." on the executable search path. > >>>Also, try adding "." to your path. That will allow you to run progs in > >>>your current directory. [quoted text clipped - 10 lines] > reproduce. Lot's of other things. Usually it's only Windows systems that > have "." on the executable search path. My job was done, thanks to Darryl L. Pierce. But I did not get why one should not add the current directory indicator. regards, vz. >> > Also, try adding "." to your path. That will allow you to run progs in >> > your current directory. [quoted text clipped - 3 lines] > > Why? 1. It's a Windows/DOS practice and not a recommended thing to do in *nix. 2. It opens security holes in your system in that it allows a script to execute a file in the current directory without you *expressly* telling it to do so. 3. Common practice on *nix is to put executables in directories named "*/bin"; any other directory should have the path explicitly stated 4. Executing arbitrary binaries in the current directory can hide problems on your system. SignatureDarryl L. Pierce <mcpierce@myrealbox.com> Visit the Infobahn Offramp - <http://mypage.org/mcpierce> "What do you care what other people think, Mr. Feynman?" > NO! BAD MOJO! Never add the current directory indicator to your search path. I've never had any problem with it, personally, but it does seem to be a common problem amongst *nix greenhorns. Good advice :) Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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