This error took me an hour to solve ERROR: Installation can not proceed. Please fix your /etc/hosts file You need to make sure the hostname is on the first line and should match the hostname of the server. All the documentation I see mentions something like mail.domain.com. This leads to confusion because usually your server […]
|
||||||
|
While trying to check whether java was working I was repeatedly getting the following error: java -version # # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 2555904 bytes for committing reserved memory. # Possible reasons: # The system is out of physical RAM […] Kubernetes is an open source project that brings ‘Google style’ cluster management capabilities to the world of virtual machines, or ‘on the metal’ scenarios. It works very well with modern operating system environments (like CoreOS or Red Hat Atomic) that offer up lightweight computing ‘nodes’ that are managed for you. It is written in Golang […] Install the Microsoft Core fonts This HOW-TO will show you how to install the Microsoft Core Fonts. These steps will download build and install an rpm with the mscorefonts. Open a terminal su – root cd ~ yum install chkfontpath rpm-build cabextract mkdir rpmbuild cd rpmbuild wget http://corefonts.sourceforge.net/msttcorefonts-2.0-1.spec rpmbuild -bb msttcorefonts-2.0-1.spec rpm -ivh RPMS/noarch/msttcorefonts-2.0-1.noarch.rpm […] this quick and simple article, we will install wget command on a CentOS 6.7 server and we have included a wget cheat sheet. Wget is a free software package for downloading files using HTTP, HTTPS and FTP. Prerequisites A CentOS 6.7 server with Root privileges, if you do no have a server and would […] This is one of the best command that facilitates the system admin to perform his specific tasks. Below is the list with the examples showing the paste command. [localhost@localhost ~]$ cat file1 apple orange mango banana [localhost@localhost ~]$ cat file2 coldplay westlife michael sunibigyana piyush [localhost@localhost ~]$ paste -s file1 apple orange mango banana [localhost@localhost […] Sending SMS Notifications From Nagios In my last article I have discuses how to install Gnokii for sending/receiving SMS from your computer. Today I’ll explain how we are using Gnokii + Nagios for sending SMS notifications to our cell phones. Its a great way to get notify of the problems while on road. I assume […] TOP 10 largest file # find /var -type f -ls | sort -k 7 -r -n | head -10 FIND FILES MORE THAN 5Gb # find /var/log/ -type f -size +5120M -exec ls -lh {} \; Find all temp files older than a month and delete: # find /usr/home/admin/Maildir/new -mtime +30-type f | xargs /bin/rm […] 1. list content of file myfile # [localhost@localhost ~] $ cat myfile apple orange mango banana GUAVA ra dish pineapple 2. delete the first line of the file # [localhost@localhost ~] $ sed ‘1d’ myfile orange mango banana GUAVA ra dish pineapple 3. delete the third line of the file # [localhost@localhost ~] $ sed […] See the list of interfaces on which tcpdump can listen # /usr/sbin/tcpdump -D Listen on any available interface # /usr/sbin/tcpdump -i any Verbose Mode # /usr/sbin/tcpdump -v # /usr/sbin/tcpdump -vv # /usr/sbin/tcpdump -vvv # /usr/sbin/tcpdump -q Limit the capture to an number of packets N # /usr/sbin/tcpdump -c N Display IP addresses and port numbers […] |
||||||
|
Copyright © 2024 - All Rights Reserved Powered by WordPress & Atahualpa |
||||||
Recent Comments