chmod 400 && sed

9/21/2016 - 9:45 AM

~   thb@io  
> echo toto > toto
                                                                                                                          
~   thb@io  
> chmod 400 toto 
                                                                                                                          
~   thb@io  
> cat toto 
toto
                                                                                                                          
~   thb@io  
> sed -i "s|toto|tutu|" toto 
                                                                                                                          
~   thb@io  
> cat toto                  
tutu
                                                                                                                          
~   thb@io  
> ll toto 
-r-------- 1 thb thb 5 sept. 21 11:44 toto
                                                                                                                          
~   thb@io  
> sed -i "s|tut|WTF?|" toto 
                                                                                                                          
~   thb@io  
> cat toto                 
WTF?u

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chmod 400 && sed