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Full Discussion: UNIX command to ignore replacing a search string if it is already present
Top Forums UNIX for Beginners Questions & Answers UNIX command to ignore replacing a search string if it is already present Post 303005370 by mehimadri12 on Tuesday 17th of October 2017 12:59:56 PM
Old 10-17-2017
UNIX command to ignore replacing a search string if it is already present
Hello,

I am searching the following string Folder^ in a file and replacing it with Folder^/
However if the file already contains Folder^/ I want to avoid replacing it with Folder^//

To do this I have to do the following today:
1) echo "Folder^" | sed 's/Folder\^/Folder\^\//g'
I get "Folder^/"
2) echo "Folder^/" | sed 's/Folder\^/Folder\^\//g'
I get "Folder^//"

Is there a way in awk or sed to do this a single command. I know I can do the following - but I am looking for a more smarter way to do this
1) replace Folder^/ by Folder^
Code:
sed 's/FOLDER\^\//FOLDER\^/g'

2) replace Folder^ by Folder^/
Code:
sed 's/FOLDER\^/FOLDER\^\//g'

Last edited by RudiC; 10-17-2017 at 02:27 PM..
 

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LEARN ABOUT MOJAVE

pam_mount

pam_mount(8)						    BSD System Manager's Manual 					      pam_mount(8)

NAME

     pam_mount -- Home Folder Mounting PAM module

SYNOPSIS

     [service-name] function-class control-flag pam_mount [options]

DESCRIPTION

     The Home Folder Mounting PAM module supports the authentication and session management function classes.  In terms of the function-class
     parameter, these are ``auth'' and ``session'' respectively.

   The Home Folder Mounting Authentication Module
     The Home Folder Mounting authentication module reads the mount authenticator from the PAM authentication context and caches it in the PAM
     environment.  The Home Folder Mounting Session Management Module must be used in conjunction with this module to remove the authenticator
     from the PAM environment.

   The Home Folder Mounting Session Management Module
     The Home Folder Mounting session management module copies the mount authenticator from the PAM environment, removes it from the PAM environ-
     ment, and uses its copy to mount the user's home folder if the user's OpenDirectory record indicates that an AFP, SMB, NFS or FileVault home
     folder is to be used.

     When the session is closed, the Home Folder Mounting session management module unmounts the user's home folder if it was mounted by this mod-
     ule when the session was opened.

SEE ALSO

     pam.conf(5), pam(8), DirectoryService(8)

BSD
								 February 7, 2009							       BSD
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