Which would generally be more efficient, or does it not matter? Option 1 is incrementing a count in a table that stores counts by the unique id, and resetting the count to zero when enough time has passed for that unique id. Option 2 is not storing a count and fetching the count of records […]
I setup an electrolysis experiment to show my kids, and wanted to explain to them what is happening. My setup has a penny as the cathode and graphite for the anode. The solution is water with baking soda mixed in. I see bubbles at each of the electrodes which I assume are Hydrogen and Oxygen […]
So the hydrated compound I am thinking about specifically is pentahydrate copper sulphate. I know when you put ionic compounds in water, the ions because hydrated by the water molecules. However, what happens when you are already putting a hydrated ion into the water? I think the solubility is supposed to be lower, but I […]
I’m still very much a newbie to all this and would like to get some help.
I’m trying to run sudo dnf system-upgrade download –refresh –releasever=30 –allowerasing (from fedora 25) and hitting the following errors. Running transaction check Error: transaction check vs depsolve: (php-composer(symfony/expression-language) >= 2.8 with php-composer(symfony/expression-language) < 5) is needed by php-phpmyadmin-motranslator-4.0-4.fc30.noarch (gcc >= 9 with gcc < 10) is needed by annobin-8.71-4.fc30.x86_64 (php-composer(symfony/translation) >= 2.7.1 with php-composer(symfony/translation) < […]
When I save webpage page via Firefox I get a directory structure like this: . ├── Some Page/ └── Some Page.html So we have got a single .html file and a folder which contains images, javascript, css, etc. Can I obtain the same result (html + single big folder) with wget (or any other command-line […]
After running sudo dnf system-upgrade download –refresh –releasever=32 –allowerasing I get the following gigantic list of errors: rpmlib(PayloadIsZstd) <= 5.4.18-1 is needed by python3-audit-3.0-0.19.20191104git1c2f876.fc32.x86_64 rpmlib(PayloadIsZstd) <= 5.4.18-1 is needed by kexi-3.1.0-7.fc32.x86_64 rpmlib(PayloadIsZstd) <= 5.4.18-1 is needed by kexi-libs-3.1.0-7.fc32.x86_64 rpmlib(PayloadIsZstd) <= 5.4.18-1 is needed by alternatives-1.11-6.fc32.x86_64 … After reading https://serverfault.com/questions/280099/how-do-i-install-an-rpm-that-complains-about-rpmlibfiledigests-4-6-0-1 I gather this is because some […]
I am trying to get a certain piece of output from running a command in my Mac terminal. I’ve noticed that when I run my-command 2> a.txt, I am able to see it in the text file and it no longer outputs in the terminal. However, when I run my_command 1> a.txt, I don’t see […]
I am building a docker image based on UBI8(Read hat Universal Base Image), Dockerfile looks like FROM registry.access.redhat.com/ubi8/ubi-minimal RUN microdnf install sudo zip tar bash procps openssl iptables net-tools tcpdump && microdnf update; microdnf clean all ENTRYPOINT [ "/usr/sbin/tcpdump" ] But it failed to install tcpdump package. Downloading metadata… error: No package matches ‘tcpdump’ (process:57): […]
If I wanted to see the contents of one file data in another file how can i see that? For example I have one file named test inside which i have some path contents and another file test1 which has less path content: Inside test file: /home/ram/a.txt /home/ram/b.txt /home/shyam/c.txt /home/bhim/a.txt Inside test1 file: /home/ram/a.txt I […]