How do I get sed to read from standard input

Question

I am trying  grep searchterm myfile csv   sed  s replaceme withthis g    and getting  unknown option to  s    What am I doing wrong   Edit   As per the comments the code is actually correct   My full code resembled something like the following  grep searchterm myfile csv   sed  s replaceme withthis g    my comment   And it appears that for some reason my comment was being fed as input into sed  Very strange

User · Answer

To make sed catch from stdin   instead of from a file  you should use -e   Like this   curl -k -u admin admin https    HOSTNAME 9070 api tm 3 8 status  HOSTNAME statistics traffic ips trafc ip    sed -e  s        g   sed -e  s      g   sed -e  s       g   awk   BEGIN FS       print  4

User · Answer

use  -e  to specify the sed-expression  cat input txt   sed -e  s foo bar g

User · Answer

use the --expression option  grep searchterm myfile csv   sed --expression  s replaceme withthis g

User · Answer

Open the file using vi myfile csv Press Escape Type   s replaceme withthis  Type  wq and press Enter   Now you will have the new pattern in your file

User · Answer

If you are trying to do an in-place update of text within a file  this is much easier to reason about in my mind    grep -Rl text to find directory to search 2 gt  dev null   while read line  do  sed -i  s text to find replacement text g   line  done

[linux] How do I get sed to read from standard input?

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