Curious about the default colors you see in a remote PuTTY session connected to the ESX Service Console?  Some are obvious such as the directory listings which show up as blue text on a black background.  Another obvious one is the compressed .tar.gz file which will show up in a nicely contrasting red text on black background.  Or how about this one which I’m sure you’ve seen, executable scripts are shown as green text on a black background.  You might be asking yourself “What about the oddball ones I see from time to time which don’t have an explanation?”  I’ve provided an example in the screenshot – a folder named isos shows up with a green background and blue text.  What does that mean? 

There’s a way to find out.  While in the remote PuTTY session connected to the ESX Service Console, run the command dircolors -p from any directory.  Here’s the default legend:

# Below are the color init strings for the basic file types. A color init
# string consists of one or more of the following numeric codes:
# Attribute codes:
# 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
# Text color codes:
# 30=black 31=red 32=green 33=yellow 34=blue 35=magenta 36=cyan 37=white
# Background color codes:
# 40=black 41=red 42=green 43=yellow 44=blue 45=magenta 46=cyan 47=white
NORMAL 00 # global default, although everything should be something.
FILE 00 # normal file
DIR 01;34 # directory
LINK 01;36 # symbolic link. (If you set this to ‘target’ instead of a
 # numerical value, the color is as for the file pointed to.)
FIFO 40;33 # pipe
SOCK 01;35 # socket
DOOR 01;35 # door
BLK 40;33;01 # block device driver
CHR 40;33;01 # character device driver
ORPHAN 40;31;01 # symlink to nonexistent file
SETUID 37;41 # file that is setuid (u+s)
SETGID 30;43 # file that is setgid (g+s)
STICKY_OTHER_WRITABLE 30;42 # dir that is sticky and other-writable (+t,o+w)
OTHER_WRITABLE 34;42 # dir that is other-writable (o+w) and not sticky
STICKY 37;44 # dir with the sticky bit set (+t) and not other-writable
# This is for files with execute permission:
EXEC 01;32
# List any file extensions like ‘.gz’ or ‘.tar’ that you would like ls
# to colorize below. Put the extension, a space, and the color init string.
# (and any comments you want to add after a ‘#’)
# If you use DOS-style suffixes, you may want to uncomment the following:
#.cmd 01;32 # executables (bright green)
#.exe 01;32
#.com 01;32
#.btm 01;32
#.bat 01;32
.tar 01;31 # archives or compressed (bright red)
.tgz 01;31
.arj 01;31
.taz 01;31
.lzh 01;31
.zip 01;31
.z 01;31
.Z 01;31
.gz 01;31
.bz2 01;31
.deb 01;31
.rpm 01;31
.jar 01;31
# image formats
.jpg 01;35
.jpeg 01;35
.gif 01;35
.bmp 01;35
.pbm 01;35
.pgm 01;35
.ppm 01;35
.tga 01;35
.xbm 01;35
.xpm 01;35
.tif 01;35
.tiff 01;35
.png 01;35
.mov 01;35
.mpg 01;35
.mpeg 01;35
.avi 01;35
.fli 01;35
.gl 01;35
.dl 01;35
.xcf 01;35
.xwd 01;35
# audio formats
.flac 01;35
.mp3 01;35
.mpc 01;35
.ogg 01;35
.wav 01;35

Applied to the screenshot example above, the legend tells us that the isos directory is: OTHER_WRITABLE 34;42 # dir that is other-writable (o+w) and not sticky.

Another color you may commonly see which I haven’t yet mentioned is cyan which identifies symbolic links.  These can be found in several directories.  Most often you will see symbolic links in /vmfs/volumes/ connecting a friendly datastore name with it’s not so friendly volume name which is better known by the VMkernel.

That’s it. Not what I would considering Earth shattering material here, but maybe you’ve seen these colors before and haven’t connected the dots on their meaning.  For people with Linux background, this is probably old hat.

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