How do I determine if a port is in use under Linux or Unix-like system? How can I verify which ports are listening on Linux server? How do I check if port is in use on Linux operating system using the CLI?
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netstat
When I try to ping other UNIX / Linux / BSD or MS-Windows servers in our network I get the following message:
TTL Expired In Transit
How do I fix this problem?
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OpenNTPD is a Unix system daemon implementing the Network Time Protocol to synchronize the local clock of a computer system with remote NTP servers. How do I install OpenNTPD under CentOS / RHEL / Fedora Linux instead of default NTPD client / server supplied by Linux operating system?
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CentOS Linux v5.5 has been released. How do I upgrade CentOS Linux from version 5.4 to latest version 5.5 over the Internet?
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How do I upgrade to Redhat Enterprise Linux server to v.5.5 from 5.4 or earlier version?
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How do I upgrade CentOS Linux from version 5.3 to latest version 5.4 over the Internet?
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