linux

Setup Oracle Java jre 1.7 on Centos 6.3

06 Feb, 2013

Download the rpm file from java.com

Install using the rpm command

rpm -Uvh jre-7u13-linux-x64.rpm

Use alternatives to config

# alternatives –config java

There are 3 programs which provide ‘java’.

Selection Command
---––––––––––––––––––––––
\* 1 /usr/java/latest/jre/bin/java
+ 2 /usr/java/jre1.7.0_13/bin/java
3 /usr/java/jdk1.7.0_13/jre/bin/java

Enter to keep the current selection[+], or type selection number:

Select the java you want to use in my case 2

Test using the command #java -version

java -version
java version “1.7.0_13”
Java(TM) SE Runtime Environment (build 1.7.0_13-b20)
Java HotSpot(TM) 64-Bit Server VM (build 23.7-b01, mixed mode)
[root@localhost plugins]#

Create links in the Mozilla Plugins directory so Java will work in supported browsers such as Firefox.

# cd /usr/lib64/mozilla/plugins/

ln -fs /usr/java/latest/lib/amd64/libnpjp2.so

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Error when run dnf install rpm-build

31 Mar, 2025

I was installing the IBM MQ Server on a linux box yesterday. I got the error bellow: \root@gateway MQServer\ dnf install rpm-build
Updating Subscription Management repositories.
Instana 14 B/s | 20 B 00:01
Errors during downloading metadata for repository 'instana-agent': Status code: 401 for https://:[email protected]/agent/rpm/generic/x86\64/repodata/repomd.xml (IP: 34.253.98.124)
Error: Failed to download metadata for repo 'instana-agent': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried
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The watch command is a useful utility in Unix-like systems that allows you to execute a command periodically and display its output. However, macOS does not come with watch pre-installed. If you're running macOS Sequoia and want to use watch, follow the steps below to install it. Recently i switch my mabook to a new MacBook Pro M2 and try to use the command to watch some openshift logs and i got the following result: !(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAA6gAAAC6CAYAAACjt2AlAAAAAXNSR0IArs4c6QAAAJBlWElmTU0AKgAAAAgABgEGAAMAAAABAAIAAAESAAMAAAABAAEAAAEaAAUAAAABAAAAVgEbAAUAAAABAAAAXgEoAAMAAAABAAIAAIdpAAQAAAABAAAAZgAAAAAAAACQAAAAAQAAAJAAAAABAAOgAQADAAAAAQABAACgAgAEAAAAAQAAA6igAwAEAAAAA

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rsync is faster than scp to copy files between machines

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rsync is generally faster than scp for copying files, especially when transferring a large amount of data or syncing directories. Here's why: 1. Incremental Transfers - rsync: Only transfers the parts of files that have changed, rather than the entire file. This makes subsequent transfers much faster. - scp: Always transfers the entire file, even if only a small part of it has changed. 2. Compression - rsync: Supports compression during the transfer (using the -z option), which reduces the amount of data sent over the network. - scp: Also supports compression (using the -C option), but it doesn't have the same efficiency in skipping unchanged data. 3. Resume Support - rsync: Can

Setup Oracle Java jre 1.7 on Centos 6.3

ln -fs /usr/java/latest/lib/amd64/libnpjp2.so

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