Deleting a line from a file with sed and awk?

Shell Programming and Scripting
1

cat file.txt

fvnuiehuewf
ruevhxncvkjrh
zxjvurhfuwe
jkhvBEGINvfnvf
ijrgioe

Trying to delete a line that has the pattern "BEGIN"

cat sedtest

filename=file.txt
pattern=BEGIN

sed "/^$pattern/d" "$filename"
2 
sed "/$pattern/d" file
3

Thank you.
How can I save this output in a variable and print that result (from variable)?

4 
# VAR=$(sed "/$pattern/d" file)
# echo $VAR
fvnuiehuewf ruevhxncvkjrh zxjvurhfuwe ijrgioe
# echo "$VAR"
fvnuiehuewf
ruevhxncvkjrh
zxjvurhfuwe
ijrgioe
5

How to print the result using sed and pipe "|" ?

6 
#!/usr/bin/bash
filename=file.txt
pattern=BEGIN
cat "$filename" | sed "/$pattern/d"
7

How to change the contents of that file?That means deleting the line with "BEGIN" pattern from the file?

8 
sed -i "/$pattern/d" file
9

I think it is not possible to do this without creating a temporary file.
Is there a way to doo this using awk?

S

---------- Post updated at 02:13 PM ---------- Previous update was at 02:12 PM ----------

sed -i doesn't work on my UNIX (solaris 5.10)

10

Thank you.
Got this here: