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Shell Programming and Scripting
replace spaces/tabs with delimiter |
Post 302512281 by kato on Saturday 9th of April 2011 08:18:57 AM
04-09-2011
Thanks Alister, I was not aware of the -i implementation detail, which is interesting. 
I like your passing of commands to ed to perform the edit, which seems very natural - use the editor to make edits. But I wonder why the -i implementation did not do something similar. Moreover, why all sed versions do not have this feature is strange.
I like your passing of commands to ed to perform the edit, which seems very natural - use the editor to make edits. But I wonder why the -i implementation did not do something similar. Moreover, why all sed versions do not have this feature is strange.
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LEARN ABOUT HPUX
vipw
vipw(1M) vipw(1M) NAME
vipw - edit the password file SYNOPSIS
DESCRIPTION
edits the password file while setting the appropriate locks, and does any necessary processing after the password file is unlocked. If the password file is already being edited, you will be told to try again later. The editor is used unless the environment variable indicates an alternate editor. performs a number of consistency checks on the password entry for and does not allow a password file with an incorrectly formatted root entry to be installed. To help reduce the possibility of leaving the system in an unbootable state, root's entry is not considered prop- erly formatted if it has a user ID that is not zero, or if it has a shell other than or Please refer to passwd(4) and the manual for further details of password file format. WARNINGS
An file that is not removed when a system crashes prevents further editing of the file using after the system is rebooted. is the standard lock used by all commands which knowingly modify Successful execution of is not sufficient for proper system operation. To help maintain consistency with other system databases, editing of the password file with is generally discouraged. Please use or to edit AUTHOR
was developed by the University of California, Berkeley. FILES
SEE ALSO
chfn(1), chsh(1), passwd(1), sam(1M), useradd(1M), usermod(1M), userdel(1M), passwd(4). vipw(1M)