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implementing function timeout in python
At many times we wished if we could break and/or continue a python function when the function takes a lot of time to complete. We can achieve this using...
How to create / build an rpm package in CentOS / Redhat Linux
RPM - is RPM package manager. Formerly known as Redhat package manager. It is the standard package management system for Redhat Linux distributions. The...
introduction to ansible
Ansible is an automation tool or a configuration management tool. Mostly used by linux system administrators. Usually admins use ansible to deploy same...
configuring snmp with ipv6 ip address
When we configure snmp with ipv6 ip address we may get an error like : SNMP Error: cannot resolve source hostname. It is because snmp is trying to resolve...
Creating selinux policies for icinga nrpe
We all know how to configure nrpe in a system and configure remote checks with nrpe. We do this with lightning speed with SELINUX=disabled. But when some...
How to upload and download files with https sftp and sftp protocols using python
We all use file servers. It may be ftp or http. to secure http communication we use https protocol. In case of ftp, there are two options. ftps and sftp...
TypeError: 'str' does not support the buffer interface
I got this error while writing a script in python 3.4. The code was like this # Create temp file tempfile.tempdir = '/tmp' temp, temp_name = tempfile...
Python script for checking linux user account and password expiry
We create many local users in linux systems. If it is a production system, we usually set expiry dates for accounts and passwords. Usually we set these...
telnet python script using telnetlib
Daily we do a lot of stuff using telnet. Usually we log in to telnet using hostname and a port, then send actions and parameters and gets the response...
Mysql Warning Using a password on the command line interface can be insecure
In new versions of mysql you will get such warning not to specify password in command line. We can resolve this warning by specifying it in file using...
Ethernet bonding in rhel7 and centos 7
Load the bonding module: [root@localhost network-scripts]# modprobe --first-time bonding Check the module: [root@localhost network-scripts]# modinfo...
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Creating Amazon Linux AMI
[...] .xml file also will be there. [root@hostname_of_instace image]# ll total 3233376 -rw-r--r-- 1 root root 916 Apr 10 03:48 cert-ABCDEFGHIJKLMN.pem -rw-r--r-- 1 root root [...]
Creating Amazon Linux AMI
[...] .ami -rw-r--r-- 1 root root 11746 Apr 10 04:08 nagios.ami.manifest.xml -rw-r--r-- 1 root root 10485760 Apr 10 04:07 nagios.ami.part.00 -rw-r--r-- 1 root root 10485760 Apr 10 04:07 [...]
Amazon ec2 ssh Server refused our key
[...] / [root@xx.xx.xx.xx ~]# chown -R root. /root/ [root@xx.xx.xx.xx ~]# ll -d /root/ drwxr-xr-x 4 root root 4096 May 11 2012 /root/ Thats it.After that everything worked fine. [...]
Please login as the ec2-user user
[...] When login to yous amazon ec2 instance via putty or command line it is possible that you get this error. Authenticating with public key "imported-openssh- [...]
sms notification using nagios
[...] , define multiple contacts. Testing : We can test the Gateway using a simple command from the command line #Wget http://api.clickatell.com/http/sendmsg? user=USERNAME&password=PASSWORD&api_id= [...]
Getting password amazon windows instance
[...] administrator password of amazon ec2 windows instance. We can decrypt the password from the command line of any linux / unix systems as follows. Syntax ec2-get-password instanceId -k key_file -K [...]
Configuring daily backup of amazon RDS server
[...] ) Creates an compressed archive (tar.gz) of all the database dumps 4) Uploads the archive to the s3 bucket. 5) Deletes the 8 days old backup from the s3 bucket. (Why do we need backups older than one [...]
Configuring daily backup of amazon RDS server
[...] ? Here we will discuss how to backup your amazon rds MySQL databases to amazon s3 bucket storage using a bash script scheduled with cron on a daily basis. Requirements : Amazon RDS ( [...]
s3cmd example commands
[...] 4 s3://bucket_name/abc.txt To download a file from the s3 bucket to the local linux host. [root@xxxxxxx ~]# s3cmd get s3://bucket_name/test.txt s3:// [...]
Confiugring daily backup of amazon centos instance
[...] discuss how to backup your amazon ec2 Linux instance to amazon s3 bucket storage using a bash script scheduled with cron on a daily basis. Requirements : Amazon ec2 ( [...]
Confiugring daily backup of amazon centos instance
[...] it. Recommended Reading 1. Host Your Web Site In The Cloud: Amazon Web Services Made Easy: Amazon EC2 Made Easy 2. Programming Amazon Web Services: S3, EC2, SQS, FPS, and SimpleDB 3. Middleware and [...]
Amazon Elastic Load balancing with autoscaling
[...] Recommended Reading 1. Host Your Web Site In The Cloud: Amazon Web Services Made Easy: Amazon EC2 Made Easy 2. Programming Amazon Web Services: S3, EC2, SQS, FPS, and SimpleDB 3. Middleware and [...]
replicating an amazon instance to different zones or regions
[...] . Recommended Reading 1. Host Your Web Site In The Cloud: Amazon Web Services Made Easy: Amazon EC2 Made Easy 2. Programming Amazon Web Services: S3, EC2, SQS, FPS, and SimpleDB 3. Middleware and [...]
Creating amazon windows ami
[...] . Recommended Reading 1. Host Your Web Site In The Cloud: Amazon Web Services Made Easy: Amazon EC2 Made Easy 2. Programming Amazon Web Services: S3, EC2, SQS, FPS, and SimpleDB 3. Middleware and [...]
Creating Amazon Linux AMI
[...] .xml file also will be there. [root@hostname_of_instace image]# ll total 3233376 -rw-r--r-- 1 root root 916 Apr 10 03:48 cert-ABCDEFGHIJKLMN.pem -rw-r--r-- 1 root root [...]
Creating Amazon Linux AMI
[...] .ami -rw-r--r-- 1 root root 11746 Apr 10 04:08 nagios.ami.manifest.xml -rw-r--r-- 1 root root 10485760 Apr 10 04:07 nagios.ami.part.00 -rw-r--r-- 1 root root 10485760 Apr 10 04:07 [...]
Amazon ec2 ssh Server refused our key
[...] / [root@xx.xx.xx.xx ~]# chown -R root. /root/ [root@xx.xx.xx.xx ~]# ll -d /root/ drwxr-xr-x 4 root root 4096 May 11 2012 /root/ Thats it.After that everything worked fine. [...]
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