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Apache failed to start with the “No space left on device” error. Error:- [error] (28)No space left on device: Cannot create SSLMutex Configuration Failed These errors means that there is no available IPC (inter-process communication) resources in the system, such as semaphores or shared memory segments. You need to check IPC resources which are used […] Avoid hackers hacking linux Apply Latest OS Patches All Linux servers running Red Hat are patched at least twice a year. Configure SSH (server) Settings: Protocol 2 # Default LogLevel INFO # Default PermitRootLogin no HostbasedAuthentication no # Default IgnoreRhosts yes # Default AllowTcpForwarding no PermitTunnel no # Default Banner /etc/issue Description: The settings are […] Enabling GZIP compression for your web application is a good way to accelerate your web site. This can reduce the size of data being transferred and, consequently, speed your application. Enabling compression on the web server will make data be transferred in compressed form. The browser will decompress the data on the fly, making the […] kills all pids matching the search word ps -ef | awk ‘/apache/ && !/awk/ {print $2}’ | xargs -r kill -9 Zombies don’t just appear in scary movies anymore, sometimes they also appear on your Linux systems; but don’t fret they are mostly harmless. What is a Zombie Process? Before we get started I wanted to first cover what exactly a Zombie process is. Linux and Unix both have the ability for a process to create […] Dealing with a large active log When the log size gets to say 1GB we want to back it up in another directory and empty the current log file. Therefore basically we are doing: cp SystemOut.log <some dir with large space> cat /dev/null > SystemOut.log
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