Saucepan - linux

awk

Anonymous (anonymous@undisclosed.example.com) — 2026-03-19T03:47:39+00:00

AWK Print Column $ awk -F "," '{print $1}' Use Env Var in AWK Basic example. Notice that you do not use a $ sign when using the variable NUMBER=4 echo | awk -v my_var=$NUMBER '{print "My var is " my_var}' Produces the ouput My var is 4 Search Where Column Has Value

bash

Anonymous (anonymous@undisclosed.example.com) — 2023-07-25T15:20:41+00:00

BASH Set VIM as visudo Run as root echo "export EDITOR=vim;" >> ~/.bashrc From VISUAL="vim" ; export VISUAL EDITOR="$VISUAL" ; export EDITOR Read File Read a list of words from a file source #!/bin/bash domainsfile="domains.txt" while read domain do echo "--" echo "[$(date)] CHECKING DOMAIN $domain" echo "--" host -W 5 -t txt "$domain". # -W 5 for a 5 second timeout done < "$domainsfile"

clone_centos_6

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Clone CentOS 6 If you have just cloned a CentOS 6 VM, you will need to change the static IP address and the hostname. Open a terminal as root and run the following commands. Change the value of HSTNAME to be the name of the new machine and change the value of IPADDRESS to be the IP address you want the new machine to have.

colour

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Linux Colour Install and use grc before any cli command to add colour. e.g. add the following at the end of .bashrc alias nmap="grc nmap" alias dig="grc dig"

configure_redmine_email

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Configure Redmine Email This page shows how to configure Redmine to allow issue creation and modification though email. That is, configure it so that you can send emails to a specific email account to create and update Redmine issues. Prerequisites

configure_udpate_mirror

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Update Mirror This page shows how to set up a CentOS 6 x86_64 mirror. Prerequisites You must have a CentOS 6 server available with over 50GB of space available. When a new 6.* is released, there is very little data in the folder. However, as time goes by, more and more updates increase the size of the directory.

curl

Anonymous (anonymous@undisclosed.example.com) — 2023-08-15T11:06:00+00:00

CURL curl --insecure --header "Host: www.dtc.example.corp" http://127.0.0.1

dhcp

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Linux DHCP Renew DHCP on Ubuntu 20.04 dhclient -r or sudo dhclient -r

disk_administration

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Linux Disk Administraton List Local Disk Size fdisk -l | grep "Disk /dev" Shred Partition shred -vfz -n 1 /dev/sdb5 Shred Drive shred -vfz -n 1 /dev/sdb Add New Hard Drive Without Rebooting Add the hard drive and then run the following (assuming you added the hard drive to SCSI channel 2).

dns

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

DNS on Linux Static DNS sudo vi /etc/netplan/00-installer-config.yaml network: ethernets: ens160: addresses: - 192.168.1.2/24 - 2001:db8:1111:2222:3333::2/64 gateway4: 192.168.1.1 gateway6: 2001:db8:1111:2222:3333::1::1 nameservers: addresses: - 192.168.1.1 - 192.168.1.2 - 2001:db8:1111:2222:3333::d1 - 2001:db8:1111:2222:3333::d2 search: - mydomain.local version: 2

dokuwiki

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Dokuwiki Page Width To make page full width, edit lib/tpl/dokuwiki/style.ini [replacements] __site_width__ = "100%"

filemanager

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

File Manager Change Default File Manager In Linux Mint 20.04 running MATE, to change from the default Caja to use Thunar instead sudo apt install thunar Create a backup of MATE config cp /usr/share/applications/defaults.list ~/ Then run sudo vi /usr/share/applications/defaults.list

find

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Find Find Specific File find -name file.name Find Files Over a Certain Size find . -size +5000k Find and Delete Certain Text Files find . -name "*sometext*.txt" -exec rm {} ';'

fonts

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Fonts Install MS Fonts * Download the msttcore-fonts rpm wget ftp://rpmfind.net/linux/sourceforge/p/po/postinstaller/fuduntu/msttcorefonts-2.0-2.noarch.rpm * Install rpm -i msttcore*.rpm * Refresh Cache fc-cache /usr/share/fonts/msttcorefonts

grep

Anonymous (anonymous@undisclosed.example.com) — 2024-07-27T19:48:15+00:00

Grep Show Additional Lines show two lines above and two lines below the search term grep -A 2 -B 2 my_search_term Seach Directory grep -rl "string" /path Invert Find anything NOT matching grep -v stuffIdonotWant Match IP Address Match IPv4 address

grub

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

GRUB Boot into Single User Mode * At grub boot screen (after restart) * Select the kernel * Press the e key to edit the entry * Select second line (the line starting with the word kernel) * Press the e key to edit kernel entry so that you can append single user mode

install_activemq

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install ActiveMQ This page shows how to install ActiveMQ on CentOS 6 Prerequisites You must have a CentOS machine already set up in accordance with the the “Install CentOS 6” guide. Download Download the latest Linux tar file from the ActiveMQ website and put it in /tmp on the target server

install_apache

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Apache This page shows how to install the Apache HTTP Server on CentOS 6 64bit. Prerequisites You must have a CentOS machine already set up in accordance with the the Install CentOS 6 guide. If you have only installed the minimal system, you will have to run the following command as root

install_centos6

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

This page shows how to install the Linux distribution CentOS 6 64bit. CentOS is a free clone of Red Hat Enterprise Linux. For the purposes of this page, we will assume that the machine being setup is called template and that the IP address is 172.16.1.1. You must change these values as appropriate when setting up your machine.

install_cups

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install CUPS This page shows how to setup a print server on a CentOS 6.4 64-bit machine. Prerequisites You must have a CentOS machine already set up in accordance with the the Install CentOS 6 guide. Install SAMBA You must first follow these steps to install SAMBA. This is a copy of our working print server 'printer' /etc/samba/smb.conf file.

install_gitolite

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Gitolite This page shows how to setup a git/gitolite server and how to setup your workstation to work with the git/gitolite server. Gitolite is a tool which allows for easy configuration of who can access projects and what permissions they have over an SSH connection.

install_guacamole

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Configure Guacamole Main Install of Guacamole Follow this guide. Some notes are below. Build Guacamole Server App sudo apt update sudo apt install build-essential libcairo2-dev libjpeg-turbo8-dev libpng-dev libtool-bin libossp-uuid-dev libvncserver-dev freerdp2-dev libssh2-1-dev libtelnet-dev libwebsockets-dev libpulse-dev libvorbis-dev libwebp-dev libssl-dev libpango1.0-dev libswscale-dev libavcodec-dev libavutil-dev libavformat-dev

install_java

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Java This page shows how to install and update Oracle JDK on a CentOS 6 64bit server. Prerequisites You must have a CentOS machine already set up in accordance with the the Install CentOS 6 guide. If you are installing Oracle Java on a Tomcat machine, uninstall all CentOS supplied Java first by running the following command as root.

install_jetty

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Jetty This page shows how to install Jetty on a CentOS 6 machine. Prerequisites We assume we have already installed and setup nginx to act as a reverse proxy. For this example, we will assume we are going to deploy an application called myapp.

install_mediawiki

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Mediawiki This page shows how to install Mediawiki on a Linux server. Prerequisites You must have a CentOS machine already set up in accordance with the the “Install CentOS 6” guide. Add Hard Drive Add a 50GB non-independent, thin provisioned disk to hold the wiki data. Store it in vm_secondary on the NetApp. Virtual Device Node should be SCSI 2:0.

install_mediawiki_pdf_creator

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Mediawiki PDF Creator This page shows how to setup the Wiki plugin called 'Collection' that allows creation of PDF books from wiki pages and the setup of the renderer server used to actually render the PDFs. Prerequisites You must have a CentOS machine already set up in accordance with the

install_nginx

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T16:37:00+00:00

Install Nginx This page show how to install Nginx with a view to using it as a reverse proxy server. Prerequisites You must have a CentOS machine already set up in accordance with the the “Install CentOS 6” guide. For CentOS 6.6 I resorted to disabling SELinux as I couldn't get the reverse proxy working with SELinux enabled

install_php

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install PHP This page shows how to install PHP on CentOS 6 64bit. Prerequisites You must have a CentOS machine already set up in accordance with the the “Install CentOS 6” guide. If you have only installed the minimal system, you will have to run the following command as root

install_redmine

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Redmine This page shows how to install Redmine on a CentOS server. We use the bitnami stack to run Redmine. Prerequisites You must have a CentOS machine already set up in accordance with the “Install CentOS 6” guide. By default, the bitnami installer will try to use port 8080/8443 if running as a non root user and 3307 for mysql. We want to use non standard ports so that the server can still use the CentOS supplied MySQL database and Tomcat/Apache. Install these first as root and get…

install_rsyslog

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install RSyslog This page shows how to setup a CentOS 6 server to act as a rsyslog server that will accept logs from other machines and store them in specific files. Prerequisites You must have a CentOS machine already set up in accordance with the the

install_samba

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install SAMBA This page shows how to setup a SAMBA server on CentOS 6 x86_64. I have noticed that whenever I setup a Linux SAMBA server that already has an DNS entry on the Domain Server, you can't 'browse' to the server in Windows. The solution is to set the machine up with an IP and name that haven't been used in AD before.

install_sftp

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install SFTP Server This page shows how to install a SFTP server on a CentOS 6 64-bit machine so that you can connect to it using a SFTP client like FileZilla. Notice that this is not the same as FTPS (which uses SSL) and it is not FTP (plain old FTP

install_tigervnc

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

VNC on Ubuntu 20.04 Install Software sudo apt install xfce4 xfce4-goodies sudo apt install tigervnc-standalone-server As the target user, set the VNC password vncpasswd Set Configuration cat << EOF >> ~/.vnc/xstartup #!/bin/bash unset SESSION_MANAGER unset DBUS_SESSION_BUS_ADDRESS [ -x /etc/vnc/xstartup ] && exec /etc/vnc/xstartup [ -r $HOME/.Xresources ] && xrdb $HOME/.Xresources vncconfig -iconic & dbus-launch --exit-with-session startxfce4 & EOF

install_tomcat

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install Tomcat This page shows how to install Tomcat 8 on CentOS 6 64bit. Prerequisites You must have a CentOS machine already set up in accordance with the “Install CentOS 6” guide. If you installed CentOS with just the 'Minimal' software package, you need to install a few tools before running this guide. Run the following as root

install_ubuntu20.04

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Ubuntu 20.04 Check DNS Check that your /etc/netplan/ file includes IPv4 DNS in addition to IPv6 Post Setup sudo apt install traceroute net-tools MOTD Set ENABLED=1 to ENABLED=0 in /etc/default/motd-news to disable MOTD adverts. sudo vi /etc/default/motd-news

install_xrdp

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Install XRDP This page shows how to install a Windows RDP server on CentOS 6 x64 so you can connect to it from a Windows desktop using mstsc.exe Prerequisites You must have a CentOS machine already set up in accordance with the the “Install CentOS 6” guide. Install XRDP

iptables

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

IPTables List iptables Rules iptables -L INPUT To get the actual port numbers rather than use of port iptables -L -n INPUT Delete iptables Rule You can delete the rules based on their number and chain name. The following deletes the fourth rule on the list

lvm

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

LVM Volumes For this article, we assume that the volume group we are working it called datavg and we are talking about a logical volume called database. Create * Create a 4GB logical volume called database. and format it with ext4. lvcreate -L 4G datavg -n database

mail_servers

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Mail Servers Postfix Won't Start If you have disabled IPv6, postfix won't start because it can't connect to an IPv6 interface. /var/log/maillog will display something like this when trying to start postfix Feb 3 14:02:13 template-tomcat postfix[2778]: fatal: parameter inet_interfaces: no local interface found for ::1

motd

Anonymous (anonymous@undisclosed.example.com) — 2023-07-11T07:12:26+00:00

Message of the Day MOTD can be silenced with touch $HOME/.hushlogin or sudo chmod -x /etc/update-motd.d/* You can edit the scripts in /etc/update-motd.d Disabling the news part (the pingback to canonical) is simple. Edit the following file: vim /etc/default/motd-news

networking

Anonymous (anonymous@undisclosed.example.com) — 2026-03-21T01:04:49+00:00

Linux IP Command here Show Subnet Data sudo apt install sipcalc sipcalc 192.168.1.0/24 -a Show Network Data Use nmcli nmcli device show or #!/bin/bash INTERFACE=ens34 echo " Interface: $INTERFACE" ip -4 addr show $INTERFACE | grep inet | awk -F " " '{print " IPv4: " $2}' ip route | grep default | grep "metric 100" | awk -F " " '{print " Gateway: " $3}' resolvectl -i $INTERFACE status --no-pager | awk '/DNS Server/,0' nmcli connection show Wired\ connect…

ntp

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

NTP on Linux Ubuntu 20.04 Show time and timezones sudo timedatectl List available timezones sudo timedatectl list-timezones Set timezone sudo timedatectl set-timezone Europe/London To view the current time and date, run the following command.

openldap

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

OpenLDAP Commands ldapsearch is located in the openldap-clients package. ldapsearch -xh ldap.example.com uid=usr1234 ldapsearch -xh ldap.example.com uid=usr1234 uniqueIdentifier ldapsearch -xh ldap.example.com uniqueIdentifier=042282876 uid uidNumber gidNumber homedirectory gsaRegistrar

performance_monitoring

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Performance Monitoring Sysstat Basics Most of the following info is from this very good article by Ramesh Natarajan Install with yum install ssstat The following gives the system CPU statistics 3 times (with 1 second interval). sar 1 3 * sar collects and displays ALL system activities statistics.

rpm

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

RPM List Installed Patched List all installed patched and include the date stamp of when they were installed. rpm -qa --queryformat '%{installtime} \"%{vendor}\" %{name}-%{version}-%{release} %{installtime:date}\n' | sort -n Install History List the installation history of PACKAGENAME.

sed

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Sed Delete Line in File To delete line 7 of test.txt sed -i 7d test.txt Delete Line with Text sed '/^WHOLELINEOFTEXT$/d' input.txt > output.txt Append to All Lines To add text to the end of each line in the file test.txt and put the result into test2.txt

ssh

Anonymous (anonymous@undisclosed.example.com) — 2023-02-15T14:11:06+00:00

SSH Go to SSH (Networking)

system_info

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Get Linux System Info Get Linux Version Number lsb_release -a or cat /etc/issue Get Process RAM Usage PROCESSID=1; TYPE="Rss";echo 0 $(cat /proc/`$PROCESSID`/smaps | grep $TYPE | awk '{print $2}' | sed 's#^#+#') | bc Where $PROCESSID is the name of the process you want to inspect and $TYPE is one of:

tar_gzip

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Tar and GZIP Compress and Zip tar -zcvf website.tar.gz /var/www * -z : Compress archive using gzip program in Linux or Unix * -c : Create archive on Linux * -v : Verbose i.e display progress while creating archive * -f : Archive File name

update

Anonymous (anonymous@undisclosed.example.com) — 2024-11-04T10:38:29+00:00

Linux Update APT Single command sudo apt update && sudo apt upgrade -y && sudo snap refresh

useful_apache

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Useful Apache Force SSL cat <<'END_OF_TEXT' >> /etc/httpd/conf/httpd.conf RewriteEngine On RewriteCond %{HTTPS} off RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} END_OF_TEXT service httpd restart Disable HTTP Trace cat <<'END_OF_TEXT' >> /etc/httpd/conf/httpd.conf RewriteEngine On RewriteCond %{REQUEST_METHOD} ^(TRACE|TRACK) RewriteRule .* - [F] END_OF_TEXT service httpd restart

users_and_groups

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

Users and Groups Create User useradd -g USERS_MAIN_GROUP -G SECONDARY_GROUP1,SECONDARY_GROUP2 -m -d /home/USERNAME USERNAME Create Group groupadd GROUPNAME Add Secondary Group to User usermod -a -G GROUPNAME USERNAME Change Password Run as root

vim

Anonymous (anonymous@undisclosed.example.com) — 2022-11-24T09:24:25+00:00

VIM Run the following to change “comment” colour to light blue instead of dark blue in VI echo ":color desert" >> ~/.vimrc

visudo

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

VI SUDO To change the visudo editor from nano to vi, run sudo update-alternatives --config editor Also, export EDITOR="vi"

vmware

Anonymous (anonymous@undisclosed.example.com) — 2024-03-30T15:15:09+00:00

Linux VMware sudo apt install open-vm-tools open-vm-tools-desktop

yum

Anonymous (anonymous@undisclosed.example.com) — 2022-11-23T12:49:42+00:00

YUM Fix YUM yum clean all yum check-update Install 32bit Versions For example, install 32bit libstdc++. On 64 bit systems, it will often only be in /usr/lib64. Install the following 32bit version to get it installed in /usr/lib. yum install libstdc++33-32bit