Zookeeper RPM for Centos 7

You can download rpm for version 3.4.14 from url zookeeper-3.4.14-1.x86_64.rpm It created from original binary from Apache Org Used: https://github.com/id/zookeeper-el7-rpm

Centos 8 – update linux kernel

rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org dnf install https://www.elrepo.org/elrepo-release-8.0-2.el8.elrepo.noarch.rpm So, install the new kernel. :~# dnf –enablerepo=elrepo-kernel install kernel-ml Setup new Kernel to default grub2-set-default 0 grub2-mkconfig -o /boot/grub2/grub.cfg

Mikrotik as OpenVPN server in 3 steps

Connect to Mikrotik via SSH and start writing text below Set global VARs Make server and client CRT Create pool, profile, interface, firewall Goto menu Files in Mikrotik admin panel and download ca.crt + client.crt + client.key Then make file SomeName.ovpn with content: Put your key and crt and change host:port vars and file auth.cfg… Читати далі »

Configure Apache for A-rating on SSLLabs

Just add following lines to vhost.conf SSLEngine on SSLProtocol TLSv1.2 TLSv1.1 SSLProxyProtocol TLSv1.2 TLSv1.1 SSLHonorCipherOrder on SSLCipherSuite EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:ECDHE-RSA-AES128-SHA:DHE-RSA-AES128-GCM-SHA256:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA25

Flume: java.lang.NoClassDefFoundError: org/apache/hadoop/io/SequenceFile$CompressionType

error: 2017-08-09 12:29:09,754 (conf-file-poller-0) [ERROR – org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:146)] Failed to start agent because dependencies were not found in classpath. Error follows. java.lang.NoClassDefFoundError: org/apache/hadoop/io/SequenceFile$CompressionType at org.apache.flume.sink.hdfs.HDFSEventSink.configure(HDFSEventSink.java:235) at org.apache.flume.conf.Configurables.configure(Configurables.java:41) at org.apache.flume.node.AbstractConfigurationProvider.loadSinks(AbstractConfigurationProvider.java:411) at org.apache.flume.node.AbstractConfigurationProvider.getConfiguration(AbstractConfigurationProvider.java:102) at org.apache.flume.node.PollingPropertiesFileConfigurationProvider$FileWatcherRunnable.run(PollingPropertiesFileConfigurationProvider.java:141) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.io.SequenceFile$CompressionType at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at… Читати далі »

QRencode

Забавна программа якщо треба перенести якийсь текст на телефон, а під рукою нема ніяких штатних месенджерів echo “text_string” | qrencode -t UTF8 -o – █████████████████████████████ █████████████████████████████ ████ ▄▄▄▄▄ █▀▄█▀▄█ ▄▄▄▄▄ ████ ████ █ █ █▀▄█▀██ █ █ ████ ████ █▄▄▄█ █▀▀ ▄ █ █▄▄▄█ ████ ████▄▄▄▄▄▄▄█▄█ ▀ █▄▄▄▄▄▄▄████ ████ ▄▄▄ ▀▄▄ ██ ▄█▄▀ ▀▄▀████ █████▀▄▄▄█▄█▀█▀▄█▀▄▀█… Читати далі »

SSH client stuck on connect

This is probably an issue with D-Bus and systemd. If the dbus service is restarted for some reason, you will also need to restart systemd-logind restart systemd-logind service: systemctl restart systemd-logind I had this same issue on CentOS 7, because the messagebus was restarted (which is how the D-Bus service is called on CentOS).