06-15-2013
Note that the cd utility is a shell built-in; so the results of a test like this could vary widely from shell to shell.
Most shells will need to set the variable PWD when they start. Some shells will remember some number of directories they have seen in calls to cd and if they have seen a target direcotry path before, they can change the value of PWD (a side effect of calling cd) by looking at an in memory cache of previously visited directories. When you renamed subfol3 to subfol4, the shell's cache didn't contain an entry for subfol4 and had to make at least one system call to determine if subfol4 was a real directory or a symbolic link to a directory.
When you renamed subfol4 back to subfol3, the shell's cache could have contained an entry for subfol3, so it may have assumed that its cache was still valid.
If you look at the truss output (instead of just looking at the getcwd line in the output) you might be able to glean what is going on under the covers. You haven't said whether either of the subfol3 or subfol4 directories had been visited before the output you showed. My guess would be that you had visited subfol3 before, to get the results you showed, but without a lot more details this is purely speculation.
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PAPS(1) General Commands Manual PAPS(1)
NAME
paps - UTF-8 to PostScript converter using Pango
SYNOPSIS
paps [options] files...
DESCRIPTION
paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves
through the pango ft2 backend.
OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is
included below.
--landscape
Landscape output. Default is portrait.
--columns=cl
Number of columns output. Default is 1.
--font=desc
Set the font description. Default is Monospace 12.
--rtl Do rtl layout.
--paper ps
Choose paper size. Known paper sizes are legal, letter, a4. Default is A4.
--bottom-margin=bm
Set bottom margin in postscript points (1/72 inch). Default is 36.
--top-margin=tm
Set top margin. Default is 36.
--left-margin=lm
Set left margin. Default is 36.
--right-margin=rm
Set right margin. Default is 36.
--help Show summary of options.
--header
Draw page header for each page.
--markup
Interpret the text as pango markup.
--encoding=ENCODING
Assume the documentation encoding is ENCODING.
--lpi Set the lines per inch. This determines the line spacing.
--cpi Set the characters per inch. This is an alternative method of specifying the font size.
--stretch-chars
Indicates that characters should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops
behaviour.
AUTHOR
paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>.
This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others).
April 17, 2006 PAPS(1)