How To Fix YUM Update Errors with Percona GPG Keys

Author: , April 16th, 2019

Problem: Trying to run a yum -y update as root aborts with the following error:

The solution, found on the Percona website, is this: sudo yum update percona-release Source URL: https://www.percona.com/blog/2019/02/05/new-percona-package-signing-key-requires-update-on-rhel-and-centos/

How To Remove a Package Without the Dependencies (yum/rpm)

Author: , January 9th, 2018

To remove a specific package without its dependencies use rpm:

As always, YMMV!

How To Fix apt-get Errors on Old Ubuntu Hosts

Author: , August 3rd, 2016

As usual, whenever I have to do sysadmin on a Ubuntu-based OS, I find problems. When will people realize what a horrible OS it is? In this case, packages needed were unavailable. For apt-get to function, the file /etc/apt/sources.list must be edited to change all URLs from security.ubuntu.com and archive.ubuntu.com to old-releases.ubuntu.com, using the sed […]

How To Install the AWS CLI

Author: , March 29th, 2016

http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-set-up.html http://docs.aws.amazon.com/cli/latest/userguide/cli-chap-getting-started.html

ls -l ~/.aws

cat ~/.aws/config

cat ~/.aws/credentials

How To Fix yum after Python Upgrade

Author: , December 8th, 2015

I upgraded to Python 2.7 and yum promptly broke. The quick fix is to edit the yum executable script and change the top line that invokes Python: sudo vim which yum CHANGE FROM: #!/usr/bin/python TO: #!/usr/bin/python26 UPDATED August 2nd, 2016: On one system, I had to use the following Python 2.4 fix instead, even though […]

How To Patch the Linux Ghost gethostbyname Buffer Overflow Vulnerability in glibc

Author: , January 28th, 2015

As per ARS Technica: “An extremely critical vulnerability affecting most Linux distributions gives attackers the ability to execute malicious code on servers used to deliver e-mail, host webpages, and carry out other vital functions.” To patch, run: yum update glibc Article: http://arstechnica.com/security/2015/01/highly-critical-ghost-allowing-code-execution-affects-most-linux-systems/ Amazon Alert: https://alas.aws.amazon.com/ALAS-2015-473.html Original Advisory: http://www.openwall.com/lists/oss-security/2015/01/27/9

How To Use netcat and telnet for Simple Network Testing

Author: , January 27th, 2015

yum install nc SERVER-SIDE: host1 shell> echo hello | nc -l 3456 CLIENT-SIDE: host2 shell> nc host1 3456 hello ~or~ CLIENT-SIDE: yum install telnet host1 shell> telnet host2 {PORT}

How To install Boto on Amazon Linux using yum and pip

Author: , August 15th, 2013

How To List All Installed Packages Using yum

Author: , April 10th, 2012

yum list installed -OR- rpm -qa

How To Install s3fs On Amazon Linux Using yum

Author: , April 2nd, 2012

To be performed as the root user:

http://code.google.com/p/s3fs/wiki/FuseOverAmazon The s3fs password file has this format (use this format if you have only one set of credentials): accessKeyId:secretAccessKey If have more than one set of credentials, then you can have default credentials as specified above, but this syntax will be recognized as well: bucketName:accessKeyId:secretAccessKey