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	mr.a_lan.ph
	May 18 2020, 5:57 AM

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	Objective: Remove instances of the 'nis' string only from these two lines: 'passwd: files nis sss' and 'group: files nis sss' at /path/to/nsswitch.conf (some other 'nis' strings exist at the 'group: files nis sss' line and elsewhere... so we'll leave them as is and narrow down the hits to the '^passwd' and '^shadow' lines only) and call the string-manipulation command/s via sudo.




	Any way to keep the whitespaces or tab stops when I use /usr/bin/ex?

	[foo@jumpspeeder ~]$ echo 'passwd: files nis sss' >~/nsswitch.conf
	[foo@jumpspeeder ~]$ cat ~/nsswitch.conf
	passwd: files nis sss
	^
	\|
	\|
	Look here...


	[foo@jumpspeeder ~]$ ex -s -c '%s/^$passwd:\\|shadow:$ \+$files$ \+nis \+$sss$/\1 \2 \3/' -c w -c q ~/nsswitch.conf
	[foo@jumpspeeder ~]$ cat ~/nsswitch.conf
	passwd: files sss
	^
	\|
	\|
	...here too.

	Thanks in advance.