what is wrong with this tr -d?


 
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# 1  
Old 02-05-2008
what is wrong with this tr -d?

here is my command in bash shell on Mac OS X tiger:

history | tr -d emacs

here is what I get:

hitory | grp "" | tr -d ""
hitory | grp "" | tr -d """"
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ''
hitory | grp "" | tr -d ``
hitory | grp "" | tr -d ""
hitory | grp "" | tr -d ""
hitory | grp "" | tr -d ""
hitory | grp "" | tr -d ""

sadly it removed all ascii characters contained within "emacs", any help appreciated
# 2  
Old 02-05-2008
You have misunderstood the use of tr, which will interpret the laetters as a list oc characters to delete. If I have understood what you want correctly, replacing the tr with this should work:

Code:
sed 's/emacs//'

# 3  
Old 02-05-2008
thanks, but sadly that didn't work either
# 4  
Old 02-06-2008
reborg means to pipe history into sed:
Code:
history | sed 's/emacs//'

What are you trying to do, exactly, not how you think it should be done?
 
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