Where is curl in Ubuntu core?

Sorry if you are trying to get the answer, I don’t have yet. Please close it.

Recently I’m trying the new Ubuntu core which is using fancy snaps as the package management tool. I’m not understanding it well, but when I did my first attempt on this OS, command curl was needed and I could not figure out a way to install it.

I did a simple search and noticed that there are several alternatives, but I just simply want a real curl command. Am I asking too much?

Have to give it up and fall back to my love Ubuntu server for now. Hopefully I could be smarter soon.

Create an ISO Image from a source CD or DVD under Linux

(source: https://www.thomas-krenn.com/en/wiki/Create_an_ISO_Image_from_a_source_CD_or_DVD_under_Linux)

This brief article will describe the creation of a proper ISO image from a CD or DVD.

If an ISO image has been created with the help of the dd (diskdump) command from a CD or DVD then the ISO file created thereby may have an MD5 checksum, which is different than the original ISO file that was used for burning the source CD or DVD. A pair of zero data blocks at the end of the CD or DVD are responsible for this. Such an ISO image can be used without any problems, however testing the MD checksum against the source disk cannot be done (the download servers that provide ISO image for Linux, for example, typically also provide MD5 checksums for testing).

Using the following procedure, exactly the same ISO image that was used for burning the CD or DVD can be read from a CD or DVD:

1. Reading the block size and the volume size:

[root@testserver ~]# isoinfo -d -i /dev/cdrom | grep -i -E 'block size|volume size' 
Logical block size is: 2048
Volume size is: 327867

2. Running dd with the parameters for block size and volume size:

[root@testserver ~]# dd if=/dev/cdrom of=test.iso bs=<block size from above> count=<volume size from above>

Note: When reading the ISO image, the following command can be used in a second console for viewing the current progress status (requires root rights):

killall -USR1 dd

With the of watch, this call can also be executed each second:

watch -n 1 killall -USR1 dd

Thereby, dd will display the progress status as follows:

admin@adminpc:~/Downloads/isos$ dd if=/dev/sr0 of=cdimage.iso bs=10M
1+0 records in
0+0 records out
0 bytes (0 B) copied, 10.2447 s, 0.0 kB/s
2+0 records in
1+0 records out
10485760 bytes (10 MB) copied, 16.3769 s, 640 kB/s
3+0 records in
2+0 records out
20971520 bytes (21 MB) copied, 22.3123 s, 940 kB/s
5+0 records in
4+0 records out
41943040 bytes (42 MB) copied, 33.6603 s, 1.2 MB/s

Got Moved

Eventually, I have moved my personal blog onto the FREE open shift service.

Once again and again, I was troubled by the auto shutdown of mysqld. I have no idea why it was like that.

The heaviest usage of my mysql server I think it’s this blog. It contains 760 blogs and a ton of pictures.

The most concern about OpenShift is that China blocks all its services. That is to say, my friends, my future friends, and strangers who come from China would be not able to access my any status, history or thought.

It doesn’t matter, in my opinion. I write this for myself only. That is it.

Anyway, it makes me happy when I have found that the memory cost of my server get reduced a lot after I moved out my blog. Yay!