Shell Programming and Scripting

hi
is it possible to cut this two semicolon separated sed commands
echo "string2 string3 string1" | sed s'/string1//g;s/string2//g'
output: " string3 "

to just one sed command without semicolon?

thanks in advance

funksen

if what you want is only "string3" ,why not use cut

Code:

 # echo "string2 string3 string1" | cut -d " " -f2
string3

thanks,

that was just an example, I want to cut out two or more strings out of a line or replace it with any other string I specify

what I want two know is how to combine search strings, like find string1 and string2 and string3 and replace all of them with the same string, and all in the same sed command

like sed 's/string1 AND string2 AND string3/string4/g'
should replace any appearance of string1, string2 and string3 with the same string, string4
which can be in any order in one line, with 100 other strings
hope its clear what I mean

funksen,
There are a few ways of doing what you want, but here is one using one sed statement as you requested:
sed -e's/string1/newstring/g' -e's/string2/newstring/g' -e's/string3/newstring/g' input_file

thanks shell_life

that is almost the same statement that I wrote in the topic, so is there no way to merge this three commands into one with some kind of separator in the first field?

echo "string1 string2 string3" | sed "s/string[1-3]/newstring/g"

Code:

echo "string1 string2 string3" | sed "s/string[1-3]/newstring/g"