add some apache tips
[wiki.git] / ubuntu.mdwn
index af2252b..6e35a6e 100644 (file)
@@ -1,7 +1,125 @@
+[[!toc levels=99]]
+
+## Package management
+
+https://help.ubuntu.com/community/AptGet/Howto
+
+[Ubuntu comparison of apt-get vs. yum commands](https://help.ubuntu.com/community/SwitchingToUbuntu/FromLinux/RedHatEnterpriseLinuxAndFedora)
+
+    # show installed packages
+    dpkg --list
+
+    # show info for a package
+    dpkg --status package_name
+
+    # show files owned by a package
+    dpkg --listfiles package_name
+
+    # resynchronize the package index files from their sources
     apt-get update
+
+    # install the newest versions installed packages
     apt-get upgrade
+
+    # install packages that are "kept back"
     apt-get dist-upgrade
 
+    # for clearing out unused linux-headers, for example
+    apt-get autoremove
+
+    # search for packages with a given string (i.e. json)
+    apt-cache search json
+
+### `apt-get dist-upgrade`
+
 "-y  Assume Yes to all queries and do not prompt" is not recommended for `apt-get dist-upgrade`
 
-<https://help.ubuntu.com/community/AptGet/Howto>
+http://askubuntu.com/questions/601/the-following-packages-have-been-kept-back-why-and-how-do-i-solve-it
+
+http://askubuntu.com/questions/81585/what-is-dist-upgrade-and-why-does-it-upgrade-more-than-upgrade
+
+## User management
+
+    useradd -m myuser -s /bin/bash
+
+https://help.ubuntu.com/community/AddUsersHowto
+
+## Shutdown and restart
+
+    poweroff
+
+    reboot
+
+## Change default $EDITOR from nano to vim
+
+    update-alternatives --config editor
+
+Choose "vim.basic".
+
+## Give user sudo access
+
+    newuser    ALL=(ALL:ALL) ALL
+
+or
+
+    newuser    ALL=NOPASSWD: ALL
+
+https://www.digitalocean.com/community/tutorials/how-to-add-delete-and-grant-sudo-privileges-to-users-on-a-debian-vps
+
+## iptables
+
+    # so that firewall rules load at boot
+    apt-get install iptables-persistent
+    # edit rules
+    vim /etc/iptables/rules.v4 
+    # reload rules
+    iptables-restore < /etc/iptables/rules.v4
+    # save rules
+    invoke-rc.d iptables-persistent save
+
+### Sample iptables firewall rules
+
+    root@server2:~# cat /etc/iptables/rules.v4
+    # Generated by iptables-save v1.4.21 on Wed Oct 14 22:17:08 2015
+    *filter
+    :INPUT ACCEPT [0:0]
+    :FORWARD ACCEPT [0:0]
+    :OUTPUT ACCEPT [72:34181]
+    -A INPUT -i lo -j ACCEPT
+    -A INPUT -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
+    -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
+    -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
+    -A INPUT -j DROP
+    COMMIT
+    # Completed on Wed Oct 14 22:17:08 2015
+    root@server2:~#
+
+https://help.ubuntu.com/community/IptablesHowTo
+
+https://www.digitalocean.com/community/tutorials/how-to-set-up-a-firewall-using-iptables-on-ubuntu-14-04
+
+## Apache httpd
+
+Install Apache
+
+    sudo apt-get install apache2
+
+https://www.digitalocean.com/community/tutorials/how-to-set-up-apache-virtual-hosts-on-ubuntu-14-04-lts
+
+Restart Apache
+
+    systemctl reload apache2
+
+Enable site
+
+    a2ensite data.greptilian.com
+
+Show enabled sites
+
+    apache2ctl -S
+
+## MySQL
+
+    sudo apt-get install mysql-server
+
+https://www.digitalocean.com/community/tutorials/a-basic-mysql-tutorial