Ruby Environment Variables
The Ruby interpreter uses the following environment variables to control its behavior. The ENV object contains a list of all currently set environment variables.
| Variable | Description |
|---|---|
| DLN_LIBRARY_PATH | Path for dynamic loading modules to search. |
| HOME | Directory to move to when no arguments are passed to Dir::chdir. Also used by File::expand_path to expand "~". |
| LOGDIR | Directory to move to when no arguments are passed to Dir::chdir and the HOME environment variable is not set. |
| PATH | Search path for executing subprocesses, and for Ruby programs after specifying the -S option. Each path is separated by a colon (semicolon in DOS and Windows). |
| RUBYLIB | Search path for libraries. Each path is separated by a colon (semicolon in DOS and Windows). |
| RUBYLIB_PREFIX | Used to modify the RUBYLIB search path by replacing the library prefix path1 with path2 using the format path1;path2 or path1path2. |
| RUBYOPT | Command-line options passed to the Ruby interpreter. Ignored in taint mode (where $SAFE is greater than 0). |
| RUBYPATH | Search path for Ruby programs after specifying the -S option. Takes precedence over PATH. Ignored in taint mode (where $SAFE is greater than 0). |
| RUBYSHELL | Specifies the shell to use when executing commands. If not set, uses SHELL or COMSPEC. |
For Unix, use the env command to view 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