AFSUSER (+) Equivalent to the afsuser shell variable. COLUMNS The number of columns in the terminal. DISPLAY Used by X Window System. If set, the shell does not set autologout (q.v.) EDITOR The pathname to a default editor. See also the VISUAL environ- ment variable and the run-fg-editor editor command. GROUP (+) Equivalent to the group shell variable. HOME Equivalent to the home shell variable. HOST (+) Initialized to the name of the machine on which the shell is running, as determined by the gethostname(2) system call. HOSTTYPE (+) Initialized to the type of machine on which the shell is run- ning, as determined at compile time. This variable is obsolete and will be removed in a future version. HPATH (+) A colon-separated list of directories in which the run-help editor command looks for command documentation. LANG Gives the preferred character environment. LC_CTYPE If set, only ctype character handling is changed. LINES The number of lines in the terminal. LS_COLORS The format of this variable is reminiscent of the termcap(5) file format; a colon-separated list of expressions of the form "xx=string", where "xx" is a two-character variable name. The variables with their associated defaults are: no 0 Normal (non-filename) text fi 0 Regular file di 01;34 Directory ln 01;36 Symbolic link pi 33 Named pipe (FIFO) so 01;35 Socket do 01;35 Door bd 01;33 Block device cd 01;32 Character device ex 01;32 Executable file mi (none) Missing file (defaults to fi) or (none) Orphaned symbolic link (defaults to ln) lc ^[[ Left code rc m Right code ec (none) End code (replaces lc+no+rc) You need to include only the variables you want to change from the default. File names can also be colorized based on filename extension. This is specified in the LS_COLORS variable using the syntax "*ext=string". For example, using ISO 6429 codes, to color all C-language source files blue you would specify "*.c=34". This would color all files ending in .c in blue (34) color. Control characters can be written either in C-style-escaped notation, or in stty-like ^-notation. The C-style notation adds ^[ for Escape, _ for a normal space character, and ? for Delete. In addition, the ^[ escape character can be used to override the default interpretation of ^[, ^, : and =. Each file will be written as <lc> <color-code> <rc> <filename> <ec>. If the <ec> code is undefined, the sequence <lc> <no> <rc> will be used instead. This is generally more convenient to use, but less general. The left, right and end codes are provided so you don't have to type common parts over and over again and to support weird terminals; you will generally not need to change them at all unless your terminal does not use ISO 6429 color sequences but a different system. If your terminal does use ISO 6429 color codes, you can compose the type codes (i.e., all except the lc, rc, and ec codes) from numerical commands separated by semicolons. The most common commands are: 0 to restore default color 1 for brighter colors 4 for underlined text 5 for flashing text 30 for black foreground 31 for red foreground 32 for green foreground 33 for yellow (or brown) foreground 34 for blue foreground 35 for purple foreground 36 for cyan foreground 37 for white (or gray) foreground 40 for black background 41 for red background 42 for green background 43 for yellow (or brown) background 44 for blue background 45 for purple background 46 for cyan background 47 for white (or gray) background Not all commands will work on all systems or display devices. A few terminal programs do not recognize the default end code properly. If all text gets colorized after you do a directory listing, try changing the no and fi codes from 0 to the numeri- cal codes for your standard fore- and background colors. MACHTYPE (+) The machine type (microprocessor class or machine model), as determined at compile time. NOREBIND (+) If set, printable characters are not rebound to self-insert- command. OSTYPE (+) The operating system, as determined at compile time. PATH A colon-separated list of directories in which to look for exe- cutables. Equivalent to the path shell variable, but in a dif- ferent format. In tcsh edit the ~/.tcshrc file and add a line like set path = ( $path /Developer/Tools ) tcsh will then update 'PATH' based on 'path' In bash edit the ~/.profile file and add a line like export PATH="$PATH:/Developer/Tools" PWD (+) Equivalent to the cwd shell variable, but not synchronized to it; updated only after an actual directory change. REMOTEHOST (+) The host from which the user has logged in remotely, if this is the case and the shell is able to determine it. Set only if the shell was so compiled; see the version shell variable. SHLVL (+) Equivalent to the shlvl shell variable. SYSTYPE (+) The current system type. (Domain/OS only) TERM Equivalent to the term shell variable. TERMCAP The terminal capability string. USER Equivalent to the user shell variable. VENDOR The vendor, as determined at compile time. VISUAL The pathname to a default full-screen editor. See also the EDITOR environment variable and the run-fg-editor editor com- mand.
bash shell variables
env - List or Set environment variables