pwdx命令在工作中使用频繁，恳求添加命令。下面附man下的命令解读

PWDX(1) User Commands PWDX(1)
NAME
pwdx - report current working directory of a process

SYNOPSIS
pwdx [options] pid [...]

OPTIONS
-V, --version
Output version information and exit.
-h, --help
Output help screen and exit.
SEE ALSO
ps(1), pgrep(1)

STANDARDS
No standards apply, but pwdx looks an awful lot like a SunOS command.

AUTHOR
Nicholas Miell ⟨nmiell@gmail.com⟩ wrote pwdx in 2004.

REPORTING BUGS
Please send bug reports to ⟨procps@freelists.org⟩

procps-ng June 2011 PWDX(1)
Manual page pwdx(1) line 1/32 (END) (press h for help or q to quit)

此命令用法很简单，但是常常会和pidof组合使用，例如： pwdx pidof nginx