Real SED tasks people ask on IRC

Swap two lines

$ printf '%s\n' one three two
one
three
two

$ printf '%s\n' one three two | \
    sed -e '2{h;d};3G'
one
two
three

Print uuid from string

$ sed -n "s/^Share '\([^']*\)'.*/\1/p" \
    cmdline/sed/testfiles/uuid-1.txt

6079aab6-e5b9-401b-820c-e1ad0e334c65

Replace "/var/run" in mysql.sock

We want to replace "/var/run" with "/var/www/".

file contents

This is a config related to mysql/mariadb.

#socket=/var/run/mysql/mysql.sock

End of the file.

Approach 1:

$ sed -e 's:/var/run:/var/www:' var-run-mysql-sock.txt

This is a config related to mysql/mariadb.

#socket=/var/www/mysql/mysql.sock

End of the file.