sed command in bash

Question

Could someone explain this command for me   cat   sed -e  s     g    sudo tee  etc init d dropbox  lt  lt  EOF    echo  Hello World  EOF   What does the  sed  command do

User · Accepted Answer

sed is the Stream EDitor  It can do a whole pile of really cool things  but the most common is text replacement   The s     g part of the command line is the sed command to execute  The s stands for substitute  the   characters are delimiters  other characters can be used       and   are popular   The   is the pattern to match  here a literal percent sign  and the   is the second pattern to match  here a literal dollar sign   The g at the end means to globally replace on each line  otherwise it would only update the first match

User · Answer

sed is a stream editor  I would say try man sed If you didn t find this man page in your system refer this URL   http   unixhelp ed ac uk CGI man-cgi sed

User · Answer

Here sed is replacing all occurrences of   with   in its standard input   As an example    echo  foo bar     sed -e  s     g    will produce  foo bar

User · Answer

It reads Hello World  cat   replaces all  g  occurrences of   by   and  over writes it to  etc init d dropbox as root

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