windows - Using only one user in cygwin -

i installed cygwin on usb stick. i'm going use cygwin on 2 computers. (my laptop , desktop computer.)

unfortunately, 2 computer have different user name. (user , ryang). every time switch 2 computers, location of user's home directory chages.

if use cygwin ryang, home directory /home/ryang. if use cygwin user, home directory in /home/user. want use 1 user, "sohnryang".

i don't want change 2 computer's settings. solution this?

the problem not 2 users different cygwin, different windows point of view.

to rename cygwin user can use file /etc/passwd

 mkpasswd -c > /etc/passwd  sed -e "s/ryang:/sohnryang:/g" -i /etc/passwd 

and can repeat in second computer

 mkpasswd -c >> /etc/passwd  sed -e "s/user:/sohnryang:/g" -i /etc/passwd 

so both share same cygwin name. : needed change first , sixth fields; leaving untouched fifth.

however 2 users different windows can verify with

c:\users\myself>whoami /user     user information ---------------- user name            sid ==================== ============================================= my_computer\myself   s-1-5-21-531030479-1339336681-3415091201-1009 

the 2 sid's different in 2 computer if user names same in windows. windows user name , sid merged in 5th field of /etc/passwd

the sid difference cause authorization issue between files created on 2 computer, depending on type of system. windows home versions more puzzling professional ones.