Default “Java” version of Mint Linux 17.3 (or Ubuntu 14.04) is OpenJDK 1.7 which works fine, but some SDKs won’t install until you upgrade to 1.8 (for example Tizen IDE studio complains on OpenJDK 1.7)
Before you start, check the current version with “java -version”
java version "1.7.0_121"
OpenJDK Runtime Environment (IcedTea 2.6.8) (7u121-2.6.8-1ubuntu0.14.04.1)
OpenJDK 64-Bit Server VM (build 24.121-b00, mixed mode)
Add the PPA, update and install oracle-java8-installer
sudo apt-add-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java8-installer
(During the install process you’ll need to accept the Oracle terms)
Now, check again with “java -version”
java version "1.8.0_111"
Java(TM) SE Runtime Environment (build 1.8.0_111-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.111-b14, mixed mode)
In case you’re still receiving the 1.7 versions as response, install “oracle-java8-set-default” package with
sudo apt install oracle-java8-set-default
and check again.
To change your hostname, you’ll need to edit /etc/hostname file with
The file content is very simple. It contains the current hostname and all you need to do is to replace it with the new one, save and exit
After you save the changes, open /etc/hosts file and replace the current hostname with the new one near 127.0.1.1 IP address.
Save file and exit.
Now, enter the next command
sudo hostname new-hostname
Your computer’s hostname will be changed immediately. (The change won’t appear in the terminal until you reopen it again)
This method will work on all Debian based distros (Ubuntu, Kubuntu, ….)
If you’re not sure which components are installed in your server/pc, you can use inxi which is a command line system information script. It will show you the system hardware, CPU, drivers, Xorg, Desktop, Kernel, GCC version(s), Processes, RAM usage, and a wide variety of other useful information.
myPC@myPC ~ $ inxi -F
System: Host: myPC Kernel: 3.19.0-32-generic x86_64 (64 bit) Desktop: Cinnamon 2.8.8
Distro: Linux Mint 17.3 Rosa
Machine: System: LENOVO product: 20E1000BSC v: ThinkPad W550s
Mobo: LENOVO model: 20E1000BSC v: SDK0E50510 WIN Bios: LENOVO v: N11ET34W (1.10 ) date: 08/20/2015
CPU: Dual core Intel Core i7-5600U (-HT-MCP-) cache: 4096 KB
clock speeds: max: 3200 MHz 1: 901 MHz 2: 981 MHz 3: 2195 MHz 4: 2199 MHz
Graphics: Card-1: Intel Broadwell-U Integrated Graphics
Card-2: NVIDIA GM108GLM [Quadro K620M]
Display Server: X.Org 1.17.1 drivers: nvidia (unloaded: intel)
Resolution: firstname.lastname@example.org, email@example.com
GLX Renderer: Quadro K620M/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 352.63
Audio: Card-1 Intel Wildcat Point-LP High Definition Audio Controller driver: snd_hda_intel
Card-2 Intel Broadwell-U Audio Controller driver: snd_hda_intel
Sound: Advanced Linux Sound Architecture v: k3.19.0-32-generic
Network: Card-1: Intel Ethernet Connection (3) I218-LM driver: e1000e
IF: eth0 state: up speed: 1000 Mbps duplex: full mac: 54:ee:75:cc:11:4a
Card-2: Intel Wireless 7265 driver: iwlwifi
IF: wlan0 state: up mac: 18:5e:0f:ee:f8:aa
Drives: HDD Total Size: 768.2GB (17.1% used) ID-1: /dev/sda model: LITEON_LCH size: 512.1GB
ID-2: /dev/sdb model: ADATA_SP600NS34 size: 256.1GB
Partition: ID-1: / size: 28G used: 9.4G (37%) fs: ext4 dev: /dev/sdb1
ID-2: /home size: 195G used: 60G (33%) fs: ext4 dev: /dev/sdb3
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 50.0C mobo: N/A gpu: 48C
Fan Speeds (in rpm): cpu: 2466
Info: Processes: 229 Uptime: 1:09 Memory: 2341.5/15748.3MB Client: Shell (bash) inxi: 2.2.28
I’m using Mint Linux and I noticed that the Bluetooth adapter is always on (I turned it off in the previous session). I’m using Bluetooth from time to time, but I don’t like to see it on when I don’t need it. Besides, it wastes battery.
You can turn it off per session (as I did), but next time it’s right back on which annoys me. As I can see, I’m not the only one who is affected with this.
The solution is set InitiallyPowered parameter to false.
sudo nano /etc/bluetooth/main.conf
Search for the entry:
and change the value to:
Next time you boot, it should be down.
In case this doesn’t help, try to turn off bluetooth service by adding “/etc/init.d/bluetooth stop” inside /etc/rc.local file (before the “exit 0” line)
Google announced plans to discontinue 32-bit Google Chrome for Linux and it has. On some 64bit Ubuntu based systems (Mint/Kubuntu/Xubuntu,..), during update process you may notice the next error:
“Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release Unable to find expected entry ‘main/binary-i386/Packages’ in Release file (Wrong sources.list entry or malformed file)”
To fix this error you’ll need to make some changes in google-chrome.list
Open /etc/apt/sources.list.d/google-chrome.list file and add [arch=amd64] before “http”
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
Do not edit or replace any other text in this file. Save the changes and refresh your package list with
The “failed to fetch” APT error should no longer appear
If you try to install Samsung printer (in my case ML1675) on Ubuntu 14.04 or Mint 17, you’ll may have some problems with missing file – rastertosplc.
If you added printer via web (http://localhost:631/) or via printer wizard, delete installed printer and follow the next instructions
Download drivers from this page: http://www.samsung.com/pk/support/model/ML-1675/XSG-downloads, extract them and install drivers with:
(follow the wizard to complete process)
cd into /usr/lib/cups/filter and check the existence of rastertosplc file.
If this file doesn’t exist add symbolic link to /opt/smfp-common/printer/bin/rastertospl with
sudo ln -s /opt/smfp-common/printer/bin/rastertospl rastertosplc
after you should have something like
bla@bla-178 /usr/lib/cups/filter $ ls -la
lrwxrwxrwx 1 root root 40 Aug 23 13:39 rastertospl -> /opt/smfp-common/printer/bin/rastertospl
lrwxrwxrwx 1 root root 40 Aug 23 13:51 rastertosplc -> /opt/smfp-common/printer/bin/rastertospl
The first file is probably created via install script while the second one is “fix” to “File “/usr/lib/cups/filter/rastertosplc” not available: No such file or directory” problem.
After you did this, add printer via wizard and try to print test page.
If you’re coming from Windows you’ll probably notice the “difference” between the fonts on Linux and Windows. You probably don’t have true type fonts installed which are commonly used on Windows based systems. They are also known as as “Windows Fonts” or “DejaVu fonts”.
You can easily install the true type fonts under Debian Linux:
# sudo apt-get install ttf-mscorefonts-installer
For Debian Lenny and later versions, free alternatives for the common Microsoft fonts Arial, Courier and Times New Roman are available in ttf-liberation package. You can install this package with:
# sudo apt-get install ttf-liberation
Logout from your current session and login again to reload the fonts.