Just received a 128 GB SanDisk Extreme PRO USB 3.1 Solid State Flash Drive. I wanted to check whether its speed really matches what’s advertised of up to 420 MB/s for read and 380 MB/s for write.
Computer Used: Lenovo Thinkpad X1 Carbon
OS: Ubuntu 16.04.3
Benchmark Tool: Standard Gnome Disks Utility
Features Tested: Read Speed, Write Speed and Random Access
- 100 samples, 100 MB each for read and write tests
- 1000 samples for access time
Average Read Rate: 423 MB/s
Average Write Rate: 188 MB/s
The SanDisk Extreme PRO USB Drive Read speed is 420 MB/s as advertised, however, the write speed is much lower than the promised 380 MB/s. It’s a quite fast USB drive, especially for read, but the write speed is about half what SanDisk claims (although still very fast for a USB drive).
A more secure alternative to NFS or SAMBA would be to use SSHFS.
Besides encrypting the data stream, it has many benefits, among which:
- Firewall-friendly, since it uses standard SSH ports
- Supports PKI
To mount an SSH filesystem from Ubuntu, do the following:
sudo apt install sshfs
sudo mkdir /MountPoint
sudo sshfs username@server:/RemoteFileSystem /MountPoint
Note: You don’t need to use sudo to mount via sshfs, just make sure you have permissions on the local mount point.
I figured out it would be much easier to just use the CleanWipe utility from here: https://symwisedownload.symantec.com//resources/sites/SYMWISE/content/live/TUTORIALS/124000/HOWTO124983/en_US/CleanWipe3897.zip?__gda__=1517979685_a3d644edaa4bd0b810351c5a6cab2aa6
The ip command is replacing ifconfig, which is getting deprecated and some distros have already removed it.
To bring a network interface down, simply run the following:
sudo ip link set enp0s25 down
To bring it back up:
sudo ip link set enp0s25 up
where enp0s25 is my network adapter. By the way, its TAB auto-completion is fantastic!
I use Dell OMSA to manage iDrac, and to be able to do that, I need to install it on my Ubuntu 16.04 laptop.
The instructions on the Dell OpenManage page doesn’t specify the correct key servers, so please use the following commands instead to add the correct key:
sudo gpg --keyserver hkps.pool.sks-keyservers.net --recv-key 1285491434D8786F
sudo gpg -a --export 1285491434D8786F | sudo apt-key add -
Now add the repo:
sudo echo 'deb http://linux.dell.com/repo/community/ubuntu xenial openmanage' | sudo tee -a /etc/apt/sources.list.d/linux.dell.com.sources.list
Finally, refresh your packages and install the base package (without the web server):
sudo apt update
sudo apt install srvadmin-base srvadmin-idracadm7
If you want more than just the base package, pick any of the following:
||Install all OMSA components
||Install only base OMSA, no web server
||Install components to manage iDRAC
||Install components to manage iDRAC7
||Install components to manage iDRAC8
||Install Web Interface
||Install RAID Management
||Install iDRAC Service Module
I was getting almost out of quota and had to remove many files. However, I didn’t know which files are taking the most space, as there wasn’t an obvious way to to that from the Google Drive interface! I had a LOT of files!
Just head to https://drive.google.com/drive/quota and you will find all the files sorted by size from largest to smallest: