lsof command HowTo - Linux / Unix Q & A from nixCraft

Linux: Find Out What Is Using TCP Port 80

last updated August 22, 2013 in Commands, Linux, Networking

How do I find out what is listing or using tcp port number 80 on Linux based systems using command line options?

Linux: Find All File Descriptors Used By a Process

last updated July 1, 2011 in Linux

How can I find all the file descriptors used by a process such as httpd (Apache web server) or mysqld (MySQL Database server)?

Linux: Check Network Connection Command

last updated January 10, 2011 in Linux, Networking

How do I check network connections under Linux using command line options?

Linux: Find Out Which Process Is Listening Upon a Port

last updated June 25, 2012 in Linux

How do I find out running processes were associated with each open port? How do I find out what process has open tcp port 111 or udp port 7000 under Linux?

Linux Syslogd: Nothing Gets Logged Using /dev/log And /jail/apache/dev/log

last updated August 22, 2010 in Apache, CentOS, Linux, RedHat and Friends, SELinux

I‘ve configured my Apache in chrooted jail at /jail/apache directory. However, my syslogd is not working and nothing gets logged using /dev/log and /jail/apache/dev/log. How do I fix this problem under CentOS 5.x AMD64 with SELinux?