disable default webpage

Once it is done, you shall disable Apache’s default welcome page. [root@rmohan.com ~]# sed -i ‘s/^/#&/g’ /etc/httpd/conf.d/welcome.conf Also, prevent the Apache web server from displaying files within the web directory. [root@rmohan.com ~]# sed -i “s/Options Indexes FollowSymLinks/Options FollowSymLinks/” /etc/httpd/conf/httpd.conf After that, start and enable the Apache web server. [root@rmohan.com ~]# systemctl start httpd.service [root@rmohan.com ~]# […]

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ansible trail

##### Steps for deployment of Ansible on CentOS 7 ##### Dependency Tasks ### Install EPEL sudo yum install epel-release ### Install pending updates sudo yum -y update ##### Install Ansible ### Install Ansible sudo yum -y install ansible ### Verify the Version ansible –version [db] node1.rmohan.com [app] node2.rmohan.com [db] node3.rmohan.com ansible all –list-hosts ansible db […]

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kubernetes

two lines info my /etc/sysctl.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 sysctl net.bridge.bridge-nf-call-iptables=1 swapoff -a firewall-cmd –reload modprobe br_netfilter echo ‘1’ > /proc/sys/net/bridge/bridge-nf-call-iptables kubeadm reset echo ‘Environment=”KUBELET_EXTRA_ARGS=–fail-swap-on=false”‘ >> /etc/systemd/system/kubelet.service.d/10-kubeadm.conf systemctl daemon-reload systemctl restart kubelet kubeadm init [root@k8s-master ~]# mkdir -p $HOME/.kube [root@k8s-master ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config [root@k8s-master ~]# chown $(id -u):$(id -g) $HOME/.kube/config Step […]

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Downgrade with glibc Update to using YUM

Downgrade with glibc Update to using YUM 1). Existing RPM version checking and backup #rpm -qa | grep glibc compat-glibc-headers-2.3.4-2.26 glibc-common-2.5-81 glibc-devel-2.5-81 compat-glibc-2.3.4-2.26 compat-glibc-2.3.4-2.26 glibc-2.5-81 glibc-headers-2.5-81 glibc-devel-2.5-81 glibc-2.5-81 2). createrepo REPODATA /usr/local/src/new_glibc # pwd /usr/local/src/new_glibc #createrepo ./ 12/12 – glibc-devel-2.5-123.el5_11.1.i386.rpm Saving Primary metadata Saving file lists metadata Saving other metadata 3). old_glibc.repo #vim /etc/yum.repos.d/new_glibc.repo [old-glibc] […]

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Ngnix

The company intends to replace http with https in the Ngxin environment. It requires http to force a jump to https. This search on the Internet, the basic summary Configure rewrite ^(.*)$ https://$host$1 permanent; Or in the server configuration return 301 https://$server_name$request_uri; Or in the server with if, here refers to the need to configure multiple […]

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How to Install Configure AWS CLI -Linux, OS X, or Unix

How to Install Configure AWS CLI -Linux, OS X, or Unix AWS CLI (Command Line Interface) The AWS Command Line Interface is a unified tool to manage your AWS services. With just one tool to download and configure, you can control multiple AWS services from the command line and automate them through scripts. Steps to […]

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Redis master-slave + KeepAlived achieve high availability

Redis master-slave + KeepAlived achieve high availability Redis is a non-relational database that we currently use more frequently. It can support diverse data types, multi-threaded high concurrency support, and redis running in memory with faster read and write. Because of the excellent performance of redis, how can we ensure that redis can deal with downtime […]

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JBoss Too Many Files Open Error

  First of all you want to determine what file(s) remain open. I’m assuming your server runs linux, so once you know JBoss’es PID ps ax | grep something-that-makes-your-jboss-process-unique you can do ls -l /proc/jbosspid/fd to get a nice list of files that are open at that instant. What you’re going to do next depends […]

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HTTPS TLS performance optimization details

HTTPS TLS performance optimization details HTTPS (HTTP over SSL) is a security-oriented HTTP channel and can be understood as HTTP + SSL/TLS, that is, adding an SSL/TLS layer under HTTP as a security foundation. The predecessor of TLS is SSL. Currently, TLS 1.2 is widely used.     TLS performance tuning TLS is widely considered to […]

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oracle xe backup

ORACLE_BASE=/u01/app/oracle export ORACLE_BASE ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe export ORACLE_HOME ORACLE_SID=XE export ORACLE_SID PATH=$ORACLE_HOME/bin:$PATH export PATH BKUP_DEST=/home/mohan/backups find $BKUP_DEST -name ‘backup*.dmp’ -mtime +10 -exec rm {} \; cd /home/mohan/backups && /u01/app/oracle/product/11.2.0/xe/bin/exp schema/password FILE=backup_`date +’%Y%m%d-%H%M’`.dmp STATISTICS=NONE startup nomount pfile=/u01/app/oracle/product/11.2.0/xe/dbs/initXE.ora / create database maxinstances 1 maxloghistory 2 maxlogfiles 16 maxlogmembers 2 maxdatafiles 30 datafile ‘/u01/app/oracle/oradata/XE/system.dbf’ size 200M reuse autoextend on next […]

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