Differences between version 12 and predecessor to the previous major change of EnvironmentVariable.
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| Newer page: | version 12 | Last edited on Monday, April 23, 2007 2:23:17 pm | by AristotlePagaltzis | Revert |
| Older page: | version 9 | Last edited on Friday, May 5, 2006 11:47:33 pm | by LawrenceDoliveiro | Revert |
@@ -1,216 +1,217 @@
A crude, simple means of InterProcessCommunication, often used for trivial configuration needs.
AddToMe: inherited by child processes, cannot be changed at runtime from outside process, etc.
-Invoke printenv(1) to print a list of the current values of all the [EnvironmentVariable]s in the invoking process.
+Invoke [
printenv(1)]
to print a list of the current values of all the [EnvironmentVariable]s in the invoking process.
-Since make(1) often uses [EnvironmentVariable]s named after commands to store the path to command in question, such names should be avoided for other purposes. Examples include __
CC__
, __
BISON__
, __
YACC__
, __
LEX__
, __
FLEX__
, __
F77__
, __
LD__
etc. It also uses the __
FLAGS__
suffix for default flags to pass a command, eg: __
CFLAGS__
, __
LDFLAGS__
, etc.
+Since [
make(1)]
often uses [EnvironmentVariable]s named after commands to store the path to command in question, such names should be avoided for other purposes. Examples include <tt>
CC</tt>
, <tt>
BISON</tt>
, <tt>
YACC</tt>
, <tt>
LEX</tt>
, <tt>
FLEX</tt>
, <tt>
F77</tt>
, <tt>
LD</tt>
etc. It also uses the <tt>
FLAGS</tt>
suffix for default flags to pass a command, eg: <tt>
CFLAGS</tt>
, <tt>
LDFLAGS</tt>
, etc.
----
!! A list of environment variables consulted by commonly used programs, libraries etc
''No claims as to comprehensiveness or correctness made.''
-__
APT_CONFIG__
:
- see apt.conf(5)
-__
ASPELL_CONF__
:
- Configuration file for aspell, see aspell(1)
-__
BROWSER__
:
- The user's prefered browser (see [http://www.tuxedo
.org/~esr/BROWSER/])
-__
BZCAT__
:
+<tt>
APT_CONFIG</tt>
:
+ see [
apt.conf(5)]
+<tt>
ASPELL_CONF</tt>
:
+ Configuration file for aspell, see [
aspell(1)]
+<tt>
BROWSER</tt>
:
+ The user's prefered browser (see [The BROWSER project |
http:/catb
.org/~esr/BROWSER/])
+<tt>
BZCAT</tt>
:
Command line arguments for bzcat
-__
BZIP2__
:
+<tt>
BZIP2</tt>
:
Command line arguments for BZIP2
-__
COLUMNS__
:
+<tt>
COLUMNS</tt>
:
Number of columns on the screen
-__
DEAD__
:
- used by Mail(1) apparently.
-__
DISPLAY__
:
- Current X(1) display
-__
EDITOR__
:
+<tt>
DEAD</tt>
:
+ used by [
Mail(1)]
apparently.
+<tt>
DISPLAY</tt>
:
+ Current [
X(1)]
display
+<tt>
EDITOR</tt>
:
Users prefered program to edit text files
-__
ftp_proxy__
:
- ftp proxy server, used by various programs (eg see apt.conf(5), lynx(1), wget(1), ...)
-__
HOME__
:
+<tt>
ftp_proxy</tt>
:
+ ftp proxy server, used by various programs (eg see [
apt.conf(5)]
, [
lynx(1)]
, [
wget(1)]
, ...)
+<tt>
HOME</tt>
:
Home directory
-__
HOSTALIASES__
:
- Path to host aliases file, see hostname(7).
-__
HOSTFILE__
:
- Path to /etc/hosts
-__
http_proxy__
:
- http proxy server, used by various programs (eg see apt.conf(5), lynx(1), wget(1), ...)
-__
[HZ]__
:
+<tt>
HOSTALIASES</tt>
:
+ Path to host aliases file, see [
hostname(7)]
.
+<tt>
HOSTFILE</tt>
:
+ Path to <tt>
/etc/hosts</tt>
+<tt>
http_proxy</tt>
:
+ http proxy server, used by various programs (eg see [
apt.conf(5)]
, [
lynx(1)]
, [
wget(1)]
, ...)
+<tt>
[HZ]</tt>
:
Kernel timer mechanism
-__
IFS__
:
- Internal Field Seperator, used for word splitting in shells, see bash(1)
-__
INPUTRC__
:
- Path to .inputrc file. see bash(1)
-__
LANG__
:
- The name of the locale to use for locale categories. See locale(5)
-__
LC_ADDRESS__
:
- Locale settings, see locale(1)
-__
LC_ALL__
:
- Locale settings, see locale(1)
-__
LC_COLLATE__
:
- Locale settings, see locale(1)
-__
LC_CTYPE__
:
- Locale settings, see locale(1)
-__
LC_IDENTIFICATION__
:
- Locale settings, see locale(1)
-__
LC_MEASUREMENT__
:
- Locale settings, see locale(1)
-__
LC_MESSAGES__
:
- Locale settings, see locale(1)
-__
LC_MONETARY__
:
- Locale settings, see locale(1)
-__
LC_NAME__
:
- Locale settings, see locale(1)
-__
LC_NUMERIC__
:
- Locale settings, see locale(1)
-__
LC_PAPER__
:
- Locale Paper size, see locale(1)
-__
LC_TELEPHONE__
:
- Locale settings, see locale(1)
-__
LD_AOUT_LIBRARY_PATH__
:
+<tt>
IFS</tt>
:
+ Internal Field Seperator, used for word splitting in shells, see [
bash(1)]
+<tt>
INPUTRC</tt>
:
+ Path to .inputrc file. see [
bash(1)]
+<tt>
LANG</tt>
:
+ The name of the locale to use for locale categories. See [
locale(5)]
+<tt>
LC_ADDRESS</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_ALL</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_COLLATE</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_CTYPE</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_IDENTIFICATION</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_MEASUREMENT</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_MESSAGES</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_MONETARY</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_NAME</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_NUMERIC</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LC_PAPER</tt>
:
+ Locale Paper size, see [
locale(1)]
+<tt>
LC_TELEPHONE</tt>
:
+ Locale settings, see [
locale(1)]
+<tt>
LD_AOUT_LIBRARY_PATH</tt>
:
LD_LIBRARY_PATH for a.out binaries
-__
LD_AOUT_PRELOAD__
:
+<tt>
LD_AOUT_PRELOAD</tt>
:
LD_PRELOAD for a.out binaries
-__
LD_ASSUME_KERNEL__
:
- used to control the choice of threading implementation by pthreads(7)
-__
LD_BIND_NOW__
:
+<tt>
LD_ASSUME_KERNEL</tt>
:
+ used to control the choice of threading implementation by [
pthreads(7)]
+<tt>
LD_BIND_NOW</tt>
:
Disable lazy linking, see [ld.so(8)]
-__
LD_KEEPDIR__
:
+<tt>
LD_KEEPDIR</tt>
:
Don't ignore directory names of a.out libraries. see [ld.so(8)]
-__
LD_LIBRARY_PATH__
:
+<tt>
LD_LIBRARY_PATH</tt>
:
Path to search for libraries, see [ld.so(8)]
-__
LD_NOWARN__
:
+<tt>
LD_NOWARN</tt>
:
Suppress warnings of a.out minor version differences, see [ld.so(8)]
-__
LD_PRELOAD__
:
+<tt>
LD_PRELOAD</tt>
:
Libraries to load before all others, see [ld.so(8)]
-__
LD_TRACE_LOADED_OBJECTS__
:
+<tt>
LD_TRACE_LOADED_OBJECTS</tt>
:
Give ldd output instead of running, see [ld.so(8)]
-__
LESSANSIENDCHARS__
:
- see less(1)
-__
LESSBINFMT__
:
- see less(1)
-__
LESSCHARDEF__
:
- Charset definition for less(1)
-__
LESSCHARSET__
:
- Charset used by less(1) to display.
-__
LESSCLOSE__
:
- see less(1)
-__
LESSECHO__
:
- see less(1)
-__
LESSEDIT__
:
- Editor used by less(1)
-__
LESSGLOBALTAGS__
:
- see less(1)
-__
LESSKEY__
:
- Name of the lesskey(1) file
-__
LESSKEY_SYSTEM__
:
- Name of the system wide lesskey(1) file
-__
LESSMETAESCAPE__
:
- see less(1)
-__
LESSOPEN__
:
- less(1) preprocessor
-__
LESS__
:
- options passed to less(1) automatically
-__
LESSSECURE__
:
- Put less(1) into secure mode.
-__
LESSSEPERATOR__
:
- used by less(1)
-__
LINES__
:
+<tt>
LESSANSIENDCHARS</tt>
:
+ see [
less(1)]
+<tt>
LESSBINFMT</tt>
:
+ see [
less(1)]
+<tt>
LESSCHARDEF</tt>
:
+ Charset definition for [
less(1)]
+<tt>
LESSCHARSET</tt>
:
+ Charset used by [
less(1)]
to display.
+<tt>
LESSCLOSE</tt>
:
+ see [
less(1)]
+<tt>
LESSECHO</tt>
:
+ see [
less(1)]
+<tt>
LESSEDIT</tt>
:
+ Editor used by [
less(1)]
+<tt>
LESSGLOBALTAGS</tt>
:
+ see [
less(1)]
+<tt>
LESSKEY</tt>
:
+ Name of the [
lesskey(1)]
file
+<tt>
LESSKEY_SYSTEM</tt>
:
+ Name of the system wide [
lesskey(1)]
file
+<tt>
LESSMETAESCAPE</tt>
:
+ see [
less(1)]
+<tt>
LESSOPEN</tt>
:
+ [
less(1)]
preprocessor
+<tt>
LESS</tt>
:
+ options passed to [
less(1)]
automatically
+<tt>
LESSSECURE</tt>
:
+ Put [
less(1)]
into secure mode.
+<tt>
LESSSEPERATOR</tt>
:
+ used by [
less(1)]
+<tt>
LINES</tt>
:
Number of lines on the screen
-__
LISTER__
:
- Used by Mail(1), obsolete version of __
PAGER__
?
-__
LOCALDOMAIN__
:
- Local domain, see hostname(7)
-__
LOGNAME__
:
+<tt>
LISTER</tt>
:
+ Used by [
Mail(1)]
, obsolete version of <tt>
PAGER</tt>
?
+<tt>
LOCALDOMAIN</tt>
:
+ Local domain, see [
hostname(7)]
+<tt>
LOGNAME</tt>
:
The name of the logged in user
-__
LPDEST__
:
+<tt>
LPDEST</tt>
:
Default printer
-__
MAILCHECK__
:
- How often to check for mail (in seconds), see bash(1)
-__
MAIL__
:
- File for the shell to check for mail, see bash(1)
-__
MAILPATH__
:
- Files for the shell to check for mail, see bash(1)
-__
[MALLOC_CHECK_]__
:
- Change the implementation of malloc(3) to catch more bugs.
-__
MANPATH__
:
+<tt>
MAILCHECK</tt>
:
+ How often to check for mail (in seconds), see [
bash(1)]
+<tt>
MAIL</tt>
:
+ File for the shell to check for mail, see [
bash(1)]
+<tt>
MAILPATH</tt>
:
+ Files for the shell to check for mail, see [
bash(1)]
+<tt>
[MALLOC_CHECK_]</tt>
:
+ Change the implementation of [
malloc(3)]
to catch more bugs.
+<tt>
MANPATH</tt>
:
Path to search for man pages
-__
MBOX__
:
- Path to mbox file? see Mail(1)
-__
NGPRNTER__
:
- Default printer, see lpr(1)
-__
NPRINTER__
:
- Default printer, see lpr(1)
-__
PAGER__
:
+<tt>
MBOX</tt>
:
+ Path to mbox file? see [
Mail(1)]
+<tt>
NGPRNTER</tt>
:
+ Default printer, see [
lpr(1)]
+<tt>
NPRINTER</tt>
:
+ Default printer, see [
lpr(1)]
+<tt>
PAGER</tt>
:
The user's prefered pager program
-__
PATH__
:
+<tt>
PATH</tt>
:
Path to search for programs
-__
[POSIXLY_CORRECT]__
:
+<tt>
[POSIXLY_CORRECT]</tt>
:
Makes programs/libraries adhere to strict [POSIX] requirements.
-__
PRINTER__
:
+<tt>
PRINTER</tt>
:
Default printer
-__
PROMPT_COMMAND__
:
- Command for the shell to run every time it displays a prompt, see bash(1)
-__
PS1__
:
- Shell prompt,
see bash(1)
-PS2
__:
- Shell prompt, see bash(1)
-__
PS3__
:
- Shell prompt, see bash(1)
-__
PS4__
:
- Shell prompt, see bash(1)
-__
PWD__
:
+<tt>
PROMPT_COMMAND</tt>
:
+ Command for the shell to run every time it displays a prompt, see [
bash(1)]
+<tt>
PS1</tt>
:
+ Shell prompt;
see [
bash(1)], particularly the
__PROMPTING
__ section for info on how to change the shell prompt.
+ <br><tt>PS1='\e[31m\A\e[0m \u@\h:\w>'</tt> looks quite nice :)
+<tt>PS2</tt>
:
+ Secondary
Shell prompt, displayed when a previous line continues;
see [
bash(1)]. (You will see this prompt if you forget to close a quote.
)
+<tt>
PS3</tt>
:
+ Shell prompt, see [
bash(1)]
+<tt>
PS4</tt>
:
+ Shell prompt, see [
bash(1)]
+<tt>
PWD</tt>
:
Process Working Directory (set by some shells)
-__
REPLYTO__
:
- Used by Mail(1), reply to address?
-__
RESOLV_ADD_TRIM_DOMAINS__
:
+<tt>
REPLYTO</tt>
:
+ Used by [
Mail(1)]
, reply to address?
+<tt>
RESOLV_ADD_TRIM_DOMAINS</tt>
:
Adds to Trim Domains, see [resolv+(8)]
-__
RESOLV_HOST_CONF__
:
- Filename of /etc/host.conf. see [resolv+(8)], host.conf(5)
-__
RESOLV_MULTI__
:
- Overrides "multi" keyword from /etc/host.conf, see [resolv+(8)]
-__
RESOLV_OVERRIDE_TRIM_DOMAINS__
:
- Overrides Tirm Domains from /etc/host.conf, see [resolv+(8)]
-__
RESOLV_REORDER__
:
- Overrides the "reorder" keyword from /etc/host.conf, see [resolv+(8)]
-__
RESOLV_SERV_ORDER__
:
- Overrides "order" keyword in /etc/host.conf, see [resolv+(8)]
-__
RESOLV_SPOOF_CHECK__
:
+<tt>
RESOLV_HOST_CONF</tt>
:
+ Filename of <tt>
/etc/host.conf</tt>
. see [resolv+(8)], [
host.conf(5)]
+<tt>
RESOLV_MULTI</tt>
:
+ Overrides "multi" keyword from <tt>
/etc/host.conf</tt>
, see [resolv+(8)]
+<tt>
RESOLV_OVERRIDE_TRIM_DOMAINS</tt>
:
+ Overrides Tirm Domains from <tt>
/etc/host.conf</tt>
, see [resolv+(8)]
+<tt>
RESOLV_REORDER</tt>
:
+ Overrides the "reorder" keyword from <tt>
/etc/host.conf</tt>
, see [resolv+(8)]
+<tt>
RESOLV_SERV_ORDER</tt>
:
+ Overrides "order" keyword in <tt>
/etc/host.conf</tt>
, see [resolv+(8)]
+<tt>
RESOLV_SPOOF_CHECK</tt>
:
Sets Spoof Checking see [resolv+(8)]
-__
SHELL__
:
+<tt>
SHELL</tt>
:
The user's shell
-__
SSH_ASKPASS__
:
- Used by ssh(1)
-__
SSH_AUTH_SOCK__
:
- Used by ssh(1)
-__
SSH_CLIENT__
:
- Used by ssh(1)
-__
SSH_ORIGINAL_COMMAND__
:
- Used by ssh(1)
-__
SSH_TTY__
:
- Used by ssh(1)
-__
SYSTEM__
:
- Operating System, used by apropos(1)
-__
TERMCAP__
:
+<tt>
SSH_ASKPASS</tt>
:
+ Used by [
ssh(1)]
+<tt>
SSH_AUTH_SOCK</tt>
:
+ Used by [
ssh(1)]
+<tt>
SSH_CLIENT</tt>
:
+ Used by [
ssh(1)]
+<tt>
SSH_ORIGINAL_COMMAND</tt>
:
+ Used by [
ssh(1)]
+<tt>
SSH_TTY</tt>
:
+ Used by [
ssh(1)]
+<tt>
SYSTEM</tt>
:
+ Operating System, used by [
apropos(1)]
+<tt>
TERMCAP</tt>
:
Terminal type capabilities file
-__
TERM__
:
+<tt>
TERM</tt>
:
The terminal type
-__
TIMEFORMAT__
:
- format of the time(1) command, see time(1) and bash(1)
-__
TMOUT__
:
- Timeout for shells to log you out, see bash(1)
-__
TMPDIR__
:
- Directory for temp files, see tempnam(3), sort(1) etc See PerUserTempDirs
-__
TZDIR__
:
+<tt>
TIMEFORMAT</tt>
:
+ format of the [
time(1)]
command, see [
time(1)]
and [
bash(1)]
+<tt>
TMOUT</tt>
:
+ Timeout for shells to log you out, see [
bash(1)]
+<tt>
TMPDIR</tt>
:
+ Directory for temp files, see [
tempnam(3)]
, [
sort(1)]
etc See PerUserTempDirs
+<tt>
TZDIR</tt>
:
Set TimeZone information
-__
TZ__
:
- Set TimeZone information, tzset(1)
-__
USER__
:
+<tt>
TZ</tt>
:
+ Set TimeZone information, [
tzset(1)]
+<tt>
USER</tt>
:
The currently logged in user
-__
VISUAL__
:
+<tt>
VISUAL</tt>
:
The user's prefered visual editor
