bitWiki linux:server

linux:server:apache

2006-12-01T00:58:41-04:00

Apache Server Info Bored@ Server Tweaks [root@boredat conf]# diff -u httpd.conf.orig httpd.conf --- httpd.conf.orig 2006-12-01 00:43:07.000000000 -0500 +++ httpd.conf 2006-12-01 00:53:09.000000000 -0500 @@ -115,9 +115,9 @@ StartServers 2 MaxClients 150 -MinSpareThreads 25 -MaxSpareThreads 75 -ThreadsPerChild 25 +MinSpareThreads 15 +MaxSpareThreads 55 +ThreadsPerChild 15 MaxRequestsPerChild 0

linux:server:centos_errata

2018-02-10T16:03:30-04:00

CentOS Errata For now, just some links/notes on errata in centos. * * * server, linux

linux:server:certificates

2009-08-06T20:15:53-04:00

certificates self-signed certificate From: Complete this section if you do NOT want to make a CA (Certificate Authority). Some steps in this document require priviledged access, and you'll want to limit access to the cert files to all but the root user. So you should su to root and create a working directory that only root has read/write access to (for example: mkdir certwork, chmod 600 certwork). Go to that directory.

linux:server:certificates_letsencrypt

2016-05-02T03:33:54-04:00

certificates - letsencrypt LetsEncrypt provides free SSL certs that you renew every few weeks. It strongly suggests python27, so for CentOS, you'll need to use SCL or some other option. Setup * install packages: yum install centos-release-SCL yum install git python27 openssl-devel yum install gcc libffi-devel openssl-devel

linux:server:clustering

2011-05-25T16:55:51-04:00

RHEL/CentOS Clustering Setup Install * Run: # yum installgroup Clustering * RHEL: yum groupinstall Clustering * Run: # yum install xauth * For use with vmware-server, you need the VMware VIX API (on both the clients and vm host) Configuration

linux:server:cyrus

2007-02-09T13:38:09-04:00

Cyrus IMAP for Slackware 11 cyrus-sasl cyrus-sasl needs to be recompiled: ./configure --prefix=/usr \ --localstatedir=/var \ --sysconfdir=/etc \ --enable-static \ --enable-shared \ --enable-gssapi \ --disable-krb4 \ --enable-login \ --with-dbpath=/etc/sasldb2 \ --with-dblib=berkeley \ --with-bdb-libdir=/lib \ --with-bdb-incdir=/usr/include/db4

linux:server:cyrus_add_user

2009-11-28T14:21:13-04:00

Create a cyrus account create account * create account/password root@bender:/home/john# saslpasswd2 -c USER * create mailbox root@bender:/home/john# cyradm --user admin localhost Password: localhost> cm user.chowndr localhost> sq user.chowndr 100000 quota:100000 localhost>

linux:server:cyrus_upgrade

2009-02-27T19:46:39-04:00

Cyrus Upgrade This page deals with upgrading to new versions of Cyrus IMAP Some info for testing imap (with imtest) 2.3.9 to 2.3.12p2 From doc/install-upgrade.html Upgrading from 2.3.9 * The method used for generating Globally Unique IDentifiers used for replication has been changed to be the SHA1 hash of the messages. If you wish to upgrade the existing GUIDs in particular mailbox(es) or the entire server, perform the following steps in the listed order. Note that is is NOT REQUIRED tha…

linux:server:fedora_kernel

2010-03-10T21:37:45-04:00

Fedora Kernel Building Information Current Version at time of writing: Fedora 12 New Info: (info for fedora > 8) Old Info: the above links shows how to download the fedora kernel source the above link explains how to build a fedora rpm kernel

linux:server:fedoravm

2007-03-22T21:02:49-04:00

Fedora Core 5 VM clock sync problem clock info The 2.6 kernel of Fedora Core 5 and VMWare 4.5.2 also fought over the system clock. Specifically, the clock in the Linux guest ran 2-5x slower than real time. This affects everything time-based, including the keyboard repeat delay, which is very annoying. The problem is well documented on the VMWare forums, and there are a couple solutions. First, try the clock=pit kernel option. (Append it to the kernel line in /etc/grub.conf). If that doesn't wo…

linux:server:galera_timezone_import

2018-02-08T21:29:20-04:00

galera timezone import The mysql.time_zone* tables are MyISAM. This causes issues for Galera/Xtrabackup replication. Really, the problem seems to be that the session variables are not properly accessible for the replicated statements. The fix: *

linux:server:gitorious

2012-01-19T22:42:26-04:00

Gitorious This is for setting up Gitorious on Centos 6. Based on the guide here: Installation prep * might as well enable eth0 (or make sure it is enabled, brainiac is registered) * install rpmforge, set the following to includepkgs: * apg libyaml* GeoIP* sphinx

linux:server:horde

2007-02-11T23:31:17-04:00

Horde web applications horde groupware webmail edition need to add some info my horde install pages: in php.ini you must add: extension=fileinfo.so extension=memcache.so linux, server

linux:server:kdump

2008-01-20T06:45:16-04:00

Kdump: Kernel Crash Dump Facility Info Kdump is a UNIX-like kernel crash dump facility. I think it is built into the Linux Kernel now. lkcd - linux kernel crash dump - original (but deprecated) crash dump facility. Red Hat is working on a utility called crash to help with the analysis of kdump crash files.

linux:server:kerberos_and_ldap

2011-03-14T21:54:20-04:00

Kerberos and LDAP This goes through setting up Kerberos and LDAP for account management. Kerberos stores the passwords, LDAP stores the account information. This was done on CentOS 5.6, but probably is portable elsewhere. Servers KDC See kerberos kdc for more detailed instructions.

linux:server:kerberos_kdc

2011-02-21T00:10:17-04:00

Kerberos KDC (key distribution center) Kerberos Server Configuration Setup * Slackware - install my kerberos package * Follow these directions : * Edit /etc/krb5.conf * Replace EXAMPLE.COM with your realm * Replace example.com with your domain

linux:server:lustre

2010-08-12T19:36:44-04:00

lustre * Quick Start Guide server, linux

linux:server:lvm

2008-02-09T09:43:38-04:00

Web Directories Spread Thin on LVM Toast. Yum! John set a fire in my pants. That fire was the passion to organize the way I store websites on my server. Basically, we setup a logical volume for each virtual server. Here's the directory layout: *

linux:server:mysql

2007-11-15T03:15:43-04:00

MySQL Information maintenance tips reset auto increment value ALTER TABLE tablename DROP id, ADD id MEDIUMINT AUTO_INCREMENT, AUTO_INCREMENT = 1 copy a table CREATE TABLE new_tbl SELECT * FROM orig_tbl; informational links key buffer size information (and other info) table cache IMPORTANT READ how to avoid sql injection - IMPORTANT READ how to store arrays in mysql via php 10 MySQL optimization tips Bored@ Server Tweaks

linux:server:nfs

2007-07-15T13:15:45-04:00

NFS Server Setup There are a few steps required to configure an nfs server: * * * * * And then we need to setup a client: * configure a client (I've configured Fedora Core 6 as an nfs client) nfs setup * enable nfs and nfslock: [root@wspace ~]# /sbin/chkconfig --level 345 nfs on [root@wspace ~]# /sbin/chkconfig --level 345 nfslock on

linux:server:nfs_raid_tests

2013-07-28T02:02:06-04:00

NFS/RAID tests artemis testing the /wspace RAID 5 volume from bender (100mbit) [john@bender ~]$ dd if=/dev/zero of=/wspace/wdrop/john/testdd bs=8092 count=100000 100000+0 records in 100000+0 records out 809200000 bytes (809 MB) copied, 79.0021 s, 10.2 MB/s

linux:server:nfs_tuning

2009-01-27T15:39:56-04:00

NFS Tuning Tuning information for NFS volumes * Add the noatime option to the NFS server's mount settings Links * * server, linux

linux:server:playstation_media_server

2011-08-30T12:35:01-04:00

PlayStation Media Server PlayStation Media Server is a java app that serves up files to your PS3. * Installed to /usr/libexec/pms/ * Fix linux/tsMuxer file permissions * link debug.log to /dev/null $ ls -l /usr/libexec/pms/debug.log lrwxrwxrwx 1 root root 9 2010-02-16 23:29 /usr/libexec/pms/debug.log -> /dev/null

linux:server:puppet

2012-03-12T01:36:51-04:00

puppet Server installation: CentOS 6 Client installation: CentOS 6, CentOS 5 Server Installation * need kickstart to do basic install up to puppet-server * copy in modules and manifests * copy puppet.conf * copy slapd.conf * install cmdb

linux:server:raid

2025-02-22T21:11:10-04:00

RAID info How to setup RAID RAID 1 (mirrored) * mdadm wiki * Some older slackware specific info * slackware 12 raid setup * tldp raid info * RAID slackware raid 1 and lvm * First, you must fdisk the drives that you would like to have in your array. Lets assume we're using /dev/hde and /dev/hdg - I create a primary partition on each disk and set its type to

linux:server:spacewalk

2011-10-20T12:56:15-04:00

spacewalk basics * Installation * you must recompile selinux-policy with a newer version (on centos) * * use the find -exec loop to import the Base repo: find . -type f -iname \*.rpm -exec echo "rpm: {}" \; -exec rhnpush --server localhost -u jfriar -p PASSWORD --channel centos6-x86_64 {} \;

linux:server:spam

2011-09-18T19:45:41-04:00

Spam Filtering Bleh, I hate spam..... Using Spamhaus' Blacklists With Sendmail Well, I basically just followed the documentation. I don't think you have to go through as many steps simply because you are a low-traffic individual user type and can point directly to the

linux:server:spam_logging

2008-01-20T14:37:24-04:00

SpamAssassin Logging Information spamd -s localX where X is 0-7 * edit your startup script for spamd: spamd_start() { if [ -x /usr/bin/spamd ]; then echo "Starting SpamAssassin: /usr/bin/spamd -d -l -s local0" /usr/bin/spamd -d -l -s local0 fi }

linux:server:vmware_time_issues

2009-03-03T02:12:46-04:00

VMware Time Issues Some vmware timekeeping info Sometimes, vmware guest OS's like to lose time like it's their job. There are a few ways to fix this, but here's what worked for me: Slackware 12.2 Host Centos 5.2 Guest * Install the VMwareTools rpm * On the host, edit the guest's *vmx file (e.g.

linux:server:vmware_tips

2012-01-02T02:20:57-04:00

vmware tips starting vmware on slackware On slackware, sometimes vmware-hostd doesn't start properly. You must: * stop apache: # /etc/rc.d/rc.httpd stop * stop vmware and httpd.vmware, and make sure they are stopped: # /etc/init.d/vmware stop # /etc/init.d/http.vmware stop # ps ax |grep vmware

linux:server:vpn

2008-01-22T01:55:55-04:00

VPN Info * * * * linux, server

linux:server:vpn_add_client

2009-08-06T22:56:53-04:00

VPN - Add Client Adding a new client to OpenVPN From: * As root, go to /etc/openvpn/easy-rsa/ * Prep: # . ./vars * Make the key - Common Name is the clients-name: # ./build-key clients-name * Add client to /etc/openvpn/ccd/ if applicable

linux:server:xen

2011-05-30T22:19:16-04:00

Xen virtualization * quick howto * dhcp with virt-install * need a xen specific kickstart file (both for dom0 and domU) * helper script to add a virtual machine, using an LV for the data: #!/bin/bash # # Xen MACs start with: 00:16:3e NAME=xen-test-client MAC=00:16:3e:00:00:00 VGNAME=xen_vg0 # create a logical volume lvcreate -L 8G -n $NAME $VGNAME # install virt-install \ --name=$NAME \ --ram=256 \ --os-type=linux \ --os-variant=rhel5.4 \ --location=/mnt/artemis/w…