Need Sed help!!

[cyberray]

hey guys i just started on sed programming,and i need to replace a "/" with a @,but i try to use the normal way i could not do this,i see a example that replacement is like this command

sed "s/Hello/Hi/g" File.txt>File1.txt

so i type like this

sed "s///@/g" File.txt>File1.txt

but it say what sed: garbled command s///@/g

i totally new to sed program,but need to use it for my project,so have to learn it..anyone pls help me thanks!

[thedondj]

You need to escape the slashes with back-slashes, so everywhere you want a '/', write '\/'.

sed "s/\//@/g" File.txt>File1.txt

[ghostdog74]

if you need to learn about sed, then you should learn awk as well. a more readable version. sub() means substitute.

awk '{sub("/","@");print}' file

[jozyba]

Use a different delimiter:

 sed "s_/_@_g" File.txt >File1.txt

[cyberray]

hey guys,thanks alot!!it work!!haha..there is still alot i dont understand about sed Programming,as i nw taking over other pple work so have to relearn from start,i knw that sed can delete sentences with a single word like

sed "/hello/d" file.txt>file1.txt

but if i wanna delete not only "hello" but also like "hi" in a sentence hw can i do it?thanks for the replies!!and hope new replies come fast..haha..

[ghostdog74]

hey guys,thanks alot!!it work!!haha..there is still alot i dont understand about sed Programming,as i nw taking over other pple work so have to relearn from start,i knw that sed can delete sentences with a single word like

sed "/hello/d" file.txt>file1.txt

but if i wanna delete not only "hello" but also like "hi" in a sentence hw can i do it?thanks for the replies!!and hope new replies come fast..haha..

awk '/hello/&&/hi/{next}{print}' file

[cyberray]

awk '/hello/&&/hi/{next}{print}' file

hi,thanks for the reply,but could u suggest doing the same job using sed programming?Thanks

[thedondj]

Using the or operator '\|' you can do the two in one replacement:

sed 's/hello\|hi//'

or with multiple replace commands

sed 's/hello//; s/hi//;'

[cyberray]

Hi thanks for the replies!!but sorry here am i with another question,pls help a sed noob ok heres the problem,i wanna delete a line when the line have like two word in common for example

/hi/hello/how/are/u

for example i wanna the line to be deleted and be replaced by another line when the line meet the character "hi" and "hello",is that possible?hope replies come fast

[jozyba]

w1="hi"
w2="hello"
r="This is the replacement line."
sed -e "s/.*$w1.*$w2.*/$r/" -e "s/.*$w2.*$w1.*/$r/" file.txt

If you want to learn lots of daft sed tricks have a look at this page:
http://www.student.northpark.edu/pem...d/sed1line.txt