Author:
erics, May 23rd, 2023
In the macOS Terminal, my mouse scroll wheel would magically start scrolling the command line history instead of the window buffer scroll bar on the right to show window history. This happened when an SSH session was disconnected or timed out. The fix is to run the reset command.
Categories: How-To's, Technology Tags: apple, bash, cli, Command line, Disconnect, History, howto, MacOS, Mouse, Scroll, Shell, ssh, Terminal, Timeout, tips
| 
No comments
Author:
erics, September 1st, 2021
There are three commands in Linux to easily get a reverse DNS lookup with: dig, host and nslookup. Here are examples of each: shell> dig -x 3.214.2.238 +short
shell> dig -x 3.214.2.238
|
|
; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.68.rc1.86.amzn1 <<>> -x 3.214.2.238 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19300 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;238.2.214.3.in-addr.arpa. IN PTR ;; ANSWER SECTION: 238.2.214.3.in-addr.arpa. 300 IN PTR ns3.wyzaerd.info. ;; Query time: 8 msec ;; SERVER: 10.0.0.2#53(10.0.0.2) ;; WHEN: Wed Sep 1 19:43:56 2021 ;; MSG SIZE rcvd: 72 |
shell> host 3.214.2.238
|
|
238.2.214.3.in-addr.arpa domain name pointer ns3.wyzaerd.info. |
shell> nslookup 3.214.2.238
|
|
Server: 10.0.0.2 Address: 10.0.0.2#53 Non-authoritative answer: 238.2.214.3.in-addr.arpa name = ns3.wyzaerd.info. |
Categories: How-To's, Technology Tags: cli, Command, Command line, dig, dig -x, DNS, Host, howto, lookup, nslookup, Reverse, Reverse DNS, tips
| No comments
Author:
erics, July 29th, 2021
I was getting error “You must specify a region” when running any aws CLI command. The fix: Using the aws command:
|
|
aws configure set region us-east-1 --profile demo |
which will automatically add the following to the file ~/.aws/config:
|
|
[profile demo] region = us-east-1 |
You many simply edit the ~/.aws/config file yourself and append the same thing:
|
|
vi ~/.aws/config [profile demo] region = us-east-1 |
Categories: How-To's, Technology Tags: AWS, aws cli, aws command, aws configure, aws set, cli, Command, Config, configure, Error, Region, You must specify a region
| No comments
Author:
erics, May 26th, 2021
|
|
mysql -N -B -e 'show variables like "%datadir%";' |
-N: No column headers -B: Batch mode – use tabs as field separators https://dev.mysql.com/doc/mysql-shell/8.0/en/mysql-shell-output-formats.html Multiple Formats Available: Table Format – use –result-format=table, alias –table Tab Separated Format – use –result-format=tabbed, alias –tabbed Vertical Format – use –result-format=vertical, alias –vertical JSON Format Output – use –result-format=VALUE, alias –json[=pretty|raw|off] VALUE may be one of: json or […]
Categories: How-To's, Technology Tags: --tabbed, cli, Format, mysql, output, Plain, Table, Vertical
| No comments
Author:
erics, December 3rd, 2020
Problem While running the aws cli command from a Perl async command inside apid, I go the following error:
|
|
IOError: [Errno 10] No child processes |
Solution The issue turned out to be a bug in Python2.7, so I upgraded to Python3.4, then uninstalled and re-installed the aws cli software so that it used the proper Python34 version. Procedure
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 |
sudo -i cd ## Upgrade Python yum install python34 alternatives --config python ## "Uninstall" old aws cli mv /opt/aws /opt/aws.fcs cd /usr/bin/ mv aws aws.fcs mv aws_completer aws_completer.fcs ## Install new aws cli curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip" unzip awscliv2.zip ./aws/install -i /opt/aws -b /usr/bin /usr/bin/aws --version |
https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2-linux.html […]
Categories: How-To's, Technology Tags: alternatives, API, apid, AWS, aws cli, AWS Linux, Broken, cli, Cloudformation, Command, Curl, Error, Exec, Execute, howto, IOError, Linux, No child processes, perl, Python, Python27, Python34, tips, Yum
| No comments
Author:
erics, November 2nd, 2020
|
|
clear; printf '\e[3J' && log show --predicate 'subsystem == "com.apple.TimeMachine"' --info --last 24h | grep -F 'eMac' | grep -Fv 'etat' | awk -F']' '{print substr($0,1,19), $NF}' |
Categories: How-To's, Technology Tags: cli, Extract, howto, Log, Logs, Script, Shell, Terminal, Time Machine, tips, view
| No comments
Author:
erics, January 30th, 2020
Recently, I wanted to see the “origin” of the git repository I was working in. The command is: git remote -v For example:
|
|
theUser@theHost$ git remote -v origin git@localhost:/volumes/data/git/thePlugin.git (fetch) origin git@localhost:/volumes/data/git/thePlugin.git (push) |
Categories: How-To's, Technology Tags: cli, Command, Display, git, git remote, howto, Linux, Show, tips
| No comments
Author:
erics, January 24th, 2020
If you are unable to update a plugin via the WP admin console, then you can do the update manually. Download the zip file to your local hard drive and extract it. Then, from the command line, do the test run first:
|
|
cd {extracted_plugin_directory} rsync -av --dry-run --delete ../{extracted_plugin_directory}/ theHost:/volumes/www/theSite/wordpress/wp-content/plugins/{extracted_plugin_directory}/ |
*Make sure to use the trailing slashes with rsync for proper operation […]
Categories: How-To's, Technology Tags: cli, Download, Error, Extract, Fail, howto, Manual, Plugin, rsync, Terminal, tips, update, WordPress, zip
| No comments
Author:
erics, July 16th, 2019
Tungsten Clustering provides high availability, disaster recovery, and a host of other benefits for MySQL / MariaDB / Percona Server databases. In this blog post we will explore some of the shell aliases I use every day to administer various Tungsten Clusters.
Categories: Mastering Tungsten Clustering, Monitor Tags: Aliases, bash, cli, Command, Command line, HA, High Availability, monitoring, mysql, Tungsten
| Comments Off on Slick Command-Line Tricks for a Tungsten MySQL / MariaDB Database Cluster
Author:
erics, February 4th, 2019
Use the ssh-keygen command on a computer to which you’ve downloaded your private key .pem file; for example: First, ensure permissions will allow ssh-keygen to work: chmod 600 /path/to/the/file/your-key-pair.pem Then generate an RSA public key: ssh-keygen -y -f /path/to/the/file/your-key-pair.pem > your-key-pair.pub
Categories: How-To's, Technology Tags: .pem, .pub, Amazon, apple, AWS, cli, howto, key, key-pair, KeyPair, Linux, Mac, MacOS, macosx, Pubkey, public, Public Key, ssh-keygen, tips
| No comments
