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Working with lot of servers, recently I logged into one of them and got an error while working with shell:
warning: setlocale: LC_CTYPE: cannot change locale (UTF-8)
It was very hard to work and see this error regularly so I found a fix.
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Today I needed to know external IP of the server where I was login to (through the jumphost). And I found pretty easy way to do that in a command line:
[user@host ~]$ curl ifconfig.me 11.22.33.44
Today I needed to know external IP of the server where I was login to (through the jumphost). And I found pretty easy way to do that in a command line:
[user@host ~]$ curl ifconfig.me 11.22.33.44
Day to day I need to use ssh port forwarding and connect securely to my work servers. So I decided to create some simple bash script which will allow me to forward port via ssh and to kill previous tunnel if it freezed.
Script source:
#!/bin/bash
# irc.sh
kill -9 `ps -aef | grep -i 'ssh -f -N -L 1234:127.0.0.1:1234 user@hostname.com' | grep -v grep | awk '{print $2}'`
ssh -f -N -L 1234:127.0.0.1:1234 user@hostname.com
This example will show you how to move MySQL datadir to another dir (in my case to “/mysqldata”) step-by-step (OS: Linux Mint):
1. create new dir (/mysqldata) and set permissions to it
sudo mkdir /mysqldata sudo chown mysql:mysql /mysqldata/