Ruby Environment Variables
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Ruby interpreter uses the following environment variables to control its behavior. The ENV object contains a list of all the current environment variables set.
| Variable | Description |
|---|---|
| DLN_LIBRARY_PATH | Search path for dynamically loaded modules. |
| HOME | Directory moved to when no argument is passed to Dir::chdir. Also used by File::expand_path to expand "~". |
| LOGDIR | Directory moved to when no arguments are passed to Dir::chdir and environment variable HOME isn't set. |
| PATH | Search path for executing subprocesses and searching for Ruby programs with the -S option. Separate each path with a colon (semicolon in DOS and Windows). |
| RUBYLIB | Search path for libraries. Separate each path with a colon (semicolon in DOS and Windows). |
| RUBYLIB_PREFIX | Used to modify the RUBYLIB search path by replacing prefix of library path1 with path2 using the format path1;path2 or path1path2. |
| RUBYOPT | Command-line options passed to Ruby interpreter. Ignored in taint mode (Where $SAFE is greater than 0). |
| RUBYPATH | With -S option, search path for Ruby programs. Takes precedence over PATH. Ignored in taint mode (where $SAFE is greater than 0). |
| RUBYSHELL | Specifies shell for spawned processes. If not set, SHELL or COMSPEC are checked. |
For Unix use env command to see a list of all environment variables.
HOSTNAME=ip-72-167-112-17.ip.secureserver.net RUBYPATH=/usr/bin SHELL=/bin/bash TERM=xterm HISTSIZE=1000 SSH_CLIENT=122.169.131.179 1742 22 SSH_TTY=/dev/pts/1 USER=amrood JRE_HOME=/usr/java/jdk/jre J2RE_HOME=/usr/java/jdk/jre PATH=/usr/local/bin:/bin:/usr/bin:/home/guest/bin MAIL=/var/spool/mail/guest PWD=/home/amrood INPUTRC=/etc/inputrc JAVA_HOME=/usr/java/jdk LANG=C HOME=/root SHLVL=2 JDK_HOME=/usr/java/jdk LOGDIR=/usr/log/ruby LOGNAME=amrood SSH_CONNECTION=122.169.131.179 1742 72.167.112.17 22 LESSOPEN=|/usr/bin/lesspipe.sh %s RUBYLIB=/usr/lib/ruby G_BROKEN_FILENAMES=1 _=/bin/env