I am trying to open Firefox in CentOS, but I'm getting the following message:Firefox is already running but is not respondingand Firefox doesn't open. I tried this in command line:  kill Firefoxbut it didn't work. Also, I don't know in which directory I must execute the right commands.How can I fix this?
Fix firefox is already running issue in Linux
process;kill;firefox
First find the process id of firefox using the following command in any directory:pidof firefoxKill firefox process using the following command in any directory:kill [firefox pid]Then start firefox again.Or you can do the same thing in just one command.As don_crissti said:kill $(pidof firefox)