Comandos de la terminal/env

• env

env

Usage: env [OPTION]... [-] [NAME=VALUE]... [COMMAND [ARG]...]
Set each NAME to VALUE in the environment and run COMMAND.

Mandatory arguments to long options are mandatory for short options too.
  -i, --ignore-environment  start with an empty environment
  -0, --null           end each output line with 0 byte rather than newline
  -u, --unset=NAME     remove variable from the environment
      --help     display this help and exit
      --version  output version information and exit

A mere - implies -i.  If no COMMAND, print the resulting environment.

Report env bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'env invocation'

[rrc@Llawyr ComandosDeLaTerminal]$ env --version
env (GNU coreutils) 8.21
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by Richard Mlynarik and David MacKenzie.

[rrc@Llawyr ComandosDeLaTerminal]$ env
XDG_VTNR=1
LC_PAPER=es_MX.UTF-8
LC_ADDRESS=es_MX.UTF-8
XDG_SESSION_ID=1
DM_CONTROL=/var/run/xdmctl
LC_MONETARY=es_MX.UTF-8
HOSTNAME=Llawyr.linuxcabal.org
GPG_AGENT_INFO=/run/user/500/keyring-q58te9/gpg:0:1
TERM=xterm
VTE_VERSION=3409
XDG_MENU_PREFIX=gnome-
SHELL=/bin/bash
XDM_MANAGED=method=classic
HISTSIZE=1000
CANBERRA_DRIVER=pulse
LC_SOURCED=1
.
.
.

[rrc@Llawyr ComandosDeLaTerminal]$ echo $PATH
/usr/local/bin:/usr/bin:/usr/games:/usr/lib64/qt4/bin:/home/rrc/bin

[rrc@Llawyr ComandosDeLaTerminal]$ ls -al Bin
total 12
drwx------ 2 rrc rrc 4096 Feb 14 12:35 ./
drwx------ 4 rrc rrc 4096 Feb 14 12:34 ../
-rwxr-xr-x 1 rrc rrc   64 Feb 14 12:35 foo*

[rrc@Llawyr ComandosDeLaTerminal]$ cat Bin/foo
#!/bin/bash

echo "Son los contenidos de foo en la carpeta Bin"

[rrc@Llawyr ComandosDeLaTerminal]$ foo
bash: foo: command not found

[rrc@Llawyr ComandosDeLaTerminal]$ env - PATH=Bin foo
PATH ahorra es Bin
Son los contenidos de foo en la carpeta Bin

[rrc@Llawyr ComandosDeLaTerminal]$ echo $PATH
/usr/local/bin:/usr/bin:/usr/games:/usr/lib64/qt4/bin:/home/rrc/bin