[root@localhost ~]# sed 'N ; s/System.Administrator/Desktop User/' data3
The first meeting of the Linux...[root@localhost ~]# sed -n 'N;/System\nAdministrator/P' data3
The first meeting of the Linux System...[root@localhost ~]# echo "This, is , a, test, to,remove, commas." | sed -n '{
:start
s/,//1p
b start...-n '{
:start
s/,//1p
/,/b start
}'
This is , a, test, to,remove, commas....-n '{
:start
s/,//1p
t start
}'
This is , a, test, to,remove, commas.