¥Command Types
_consider the
commands:
"/bin/ls ~
"ls ~
"cd ~
"wc
~/AFNI_data1/afni/ideal_r1.1D
_the
"which" command shows where the shell gets a command from:
"which ls which cd which wc
_the shell must
decide what type of command it has:
"full pathname for a
program: execute that program
"alias: apply any alias(es)
then start over (decide on which program to run)
"shell command: part of
the /bin/tcsh program
"check the $PATH directories for the
program
"
¥The PATH Variable
_a list of
directories to be searched for a given program to be run from
_the $path
and $PATH variables are
identical, but are represented differently
_commands: echo
$PATH
" echo $path
" cat ~/.cshrc