Eureka Moment linux:ubuntu

linux:ubuntu:add_swap

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

How to add swap on Ubuntu One of the easiest way of increasing the responsiveness of your server (and guarding against out of memory errors in your applications) is to add some swap space. Swap is an area on a hard drive that has been designated as a place where the operating system can temporarily store data that it can no longer hold in RAM. This gives you the ability to increase the amount of information that your server can keep in its working “memory”. The space on the hard drive will be u…

linux:ubuntu:apache_ad

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Allow any Active Directory user to access a folder on Apache 2.4 hosted on Linux When you need to protect a folder on your Apache 2.4 web server installed on a Linux system (on Ubuntu in my case), here is how you do it:First you need to enable Apache modules 'ldap' and 'authnz_ldap'. You can do it on Ubuntu 14.04 by issuing the following command:

linux:ubuntu:boot_to_tui

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Boot to text console by default Just in-case you like the idea of disabling your Ubuntu desktop's graphical interface upon start-up and put you in terminal mode. Open terminal and edit /etc/default/grub file sudo vim /etc/default/grub look for this line:

linux:ubuntu:ca

Anonymous (anonymous@undisclosed.example.com) — 2022-02-02T11:03:03+00:00

OpenSSL CA on Ubuntu server 20.04 OpenSSL is a free, open-source library that you can use for digital certificates. One of the things you can do is build your own CA (Certificate Authority). A CA is an entity that signs digital certificates. An example of a well-known CA is Verisign. Many websites on the Internet use certificates for their HTTPS connections that were signed by Verisign.

linux:ubuntu:change_hostname

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Change Ubuntu serve hostname * edit /etc/cloud/cloud.cfg * Search for preserve_hostname and change the value from false to true * Edit /etc/hostname

linux:ubuntu:cli_install

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Install .deb from CLI on Ubuntu First install the package sudo dpkg -i /path/to/deb/file Then install unresolved dependancies sudo apt-get install -f

linux:ubuntu:dislocker

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Using dislocker to mount BitLocker encrypted devices on Ubuntu Linux If you have a BitLocker encrypted USB drive, and need to access it on a GNU/Linux machine, you're in luck. There is an utility called Dislocker which can be found at You can install it on Ubuntu with out much effort. [wpdm_file id=8 title=

linux:ubuntu:get_kernel_version

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Find your Ubuntu kernel version The Linux kernel, which is responsible for managing the system hardware, is a core component of every Ubuntu system. From time to time there are vulnerabilities that affect specific kernel versions, and being able to verify whether or not you are affected can be helpful. Certain features and hardware support are tied to certain kernel versions as well. Here is how you discover your Ubuntu kernel version.

linux:ubuntu:install_lamp

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Install LAMP on Ubuntu sudo apt-get install apache2 sudo apt-get install mysql-server sudo apt-get install php5 libapache2-mod-php5 sudo /etc/init.d/apache2 restart php -r 'echo "\n\nYour PHP installation is working fine.\n\n\n";'

linux:ubuntu:nfs_shares

Anonymous (anonymous@undisclosed.example.com) — 2025-03-19T12:33:28+00:00

Creating NFS shares between two linux machines # Install nfs server sudo apt update sudo apt install nfs-kernel-server # Create share directory sudo mkdir -p /srv/nfs/share sudo chown -R nobody:nogroup /srv/nfs/share sudo chmod 777 /srv/nfs/share # Edit exports file sudo nano /etc/exports /srv/nfs/share client-ip-or-subnet(rw,sync,no_subtree_check,no_root_squash) # Restart the server sudo exportfs -ra sudo systemctl restart nfs-kernel-server # List exports showmount -e # Expected output…

linux:ubuntu:notify

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Send GUI notification from CLI on Ubuntu If you have a script running, or a cron task and you want to know when it's done and was it successful, simply send a notification from a script to your desktop with the following command: $ notify-send "Message title" "Message body"

linux:ubuntu:nvidia_bumblebee

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Installing Bumblebee in Ubuntu 14.04 If you are unfortunate like I, and have an Asus n55sf laptop and want to use your discreet Nvidia graphics adapter, you can't install stock Nvidia driver. You have to install Bumblebee instead. Here is how you can do it painlessly:

linux:ubuntu:openssl_examples

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Convert certificates with OpenSSL DER openssl x509 -inform der -in certificate.cer -out certificate.pem PEM openssl x509 -outform der -in certificate.pem -out certificate.der openssl crl2pkcs7 -nocrl -certfile certificate.cer -out certificate.p7b -certfile CACert.cer

linux:ubuntu:rdp_ad_usr

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Use Ubuntu Mate as a terminal server with Active Directory users If you woke up this morning and said to your self “I'm looking for a good remote desktop connection to my Linux machine and can't find one that is both smooth and clear”, then you are in the right place. (Back by popular demand) Although I have already done several tutorials on the subject, I am going to show how it's done - all at once (and review the procedures to accommodate for the new software versions).

linux:ubuntu:server_service_startup

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Manage Ubuntu server services Startup services management: Install the following application and use the TUI sudo apt-get install sysv-rc-conf or do it in CLI sudo update-rc.d urbackupsrv defaults

linux:ubuntu:ssh_conf

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Configuring Ssh on Ubuntu Installing and configuring SSH on Ubuntu server (If you haven't done it during installation) If you haven't installed SSH yet, do it now: sudo apt-get install openssh-server Now, edit your /etc/ssh/sshd_config file Set a list of users who can login

linux:ubuntu:start

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Ubuntu * Add ‘trash’ functionality to Ubuntu Server * Allow any Active Directory user to access a folder on Apache 2.4 hosted on Linux * Boot to text console by default * Change timezone on Ubuntu server * Change Ubuntu hostname * Change Ubuntu serve hostname * Configuring Ssh on Ubuntu * Convert certificates with OpenSSL * Creating NFS shares between two linux machines * Find your Ubuntu kernel version * How to add swap on Ubuntu * Install .deb from CLI on Ubuntu * Install LAMP…

linux:ubuntu:steam_not_open

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Steam won’t open in Ubuntu 15.10 or 16.04 Found the solution to this one on a forum, buried under a pile of messages. Anyway, the idea was that Steam uses it’s own dynamic libraries but Ubuntu comes with some newer ones… NOTE: If you’re just installing Steam for the first time, you will need to run the commands a second time after the initial update. This will take a looong time!

linux:ubuntu:swap

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Linux SWAP How Linux uses RAM (very simplified) Each application can use some of your memory. Linux uses all otherwise unoccupied memory (except for the last few Mb) as “cache”. This includes the page cache, inode caches, etc. This is a good thing - it helps speed things up heaps. Both writing to disk and reading from disk can be sped up immensely by cache.

linux:ubuntu:systemctl_timezone_and_ntp

Anonymous (anonymous@undisclosed.example.com) — 2022-02-01T07:50:00+00:00

Set timezone and ntp on systemd distro sudo timedatectl set-timezone Europe/Zagreb sudo vim /etc/systemd/timesyncd.conf # append line NTP=hr.pool.ntp.org sudo systemctl restart systemd-timesyncd systemctl status systemd-timesyncd

linux:ubuntu:time_zone

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Change timezone on Ubuntu server I have a virtual machine somewhere, where i host a web application. I had to change the time zone since the time stamps in MySql were wrong. Here is how to do it without installing a GUI:First, start the TUI time management tool

linux:ubuntu:trash

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Add ‘trash’ functionality to Ubuntu Server If, while working on the console of the Ubuntu Server, you often have to delete some files, you might be prone to accidentally delete something you actually needed to keep. The problem with Ubuntu Server is that its ‘rm’ command deletes immediately. Fortunately, there is ‘trash-cli’ package that can help.You can install it by using apt-get commend:

linux:ubuntu:ubuntu_lamp_bind

Anonymous (anonymous@undisclosed.example.com) — 2022-02-13T15:29:55+00:00

Ubuntu LAMP + Bind $ apt update $ apt upgrade $ adduser sudouser $ usermod -aG sudo sudouser # Login via SSH using the new user and test if sudo works $ vim /etc/ssh/sshd_config # Find line 'PermitRootLogin' and set it to 'no' PermitRootLogin no # Restart SSH server $ systemctl restart sshd

linux:ubuntu:ubuntu_server_hostname

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Change Ubuntu hostname Edit the /etc/hostname file - update it with the new desired hostname sudo vim /etc/hostname Also edit /etc/hosts and change the line which reads: 127.0.1.1 your-old-hostname to you new hostname Reboot

linux:ubuntu:vsftpd

Anonymous (anonymous@undisclosed.example.com) — 2019-10-31T09:05:00+00:00

Install vsftpd on Ubuntu * apt install vsftpd * edit /etc/vsftpd.conf * local_enable=YES * local_umask=022 * write_enable=YES * chroot_local_user=YES * allow_writeable_chroot=YES * pasv_enable=Yes * pasv_min_port=40000