linux
linux show file and dir sizes
For current dir for file and dirs in current path, with max depth 1 or just simply(h, d, 1 args merged as one)
error fix
fix “Certificate verification failed” error in apt update of docker container
Background While working on a raw docker base image that didn’t even have basic tools installed, I tried to call apt update but the following error came up This error occurred even after setting “http_proxy” and “https_proxy” environment variables. Solution This stackoverflow answer fixed this issue. Although it was bypass, Read more…
linux
fixing “Could not handshake: An unexpected TLS packet was received” error while apt update in docker container behind corporate proxy
Background While trying to build a docker image from a very raw apache spark base image, since it didn’t have any basic packages such as vim, ssh, wget, etc, I entered a running container of this image and typed apt update but the following error msg was returned This error Read more…
error fix
ssh local port forwarding and error fix for “channel 3: open failed: connect failed: Connection refused”
My Scenario I have a remote server(4.4.4.4) where I am running a python django webserver on port 8008. However, the remove server is only allowing ssh port 32686, which means that I cannot directly access remote server at port 8008 to view the webserver. This is why I am local Read more…
linux
check ubuntu version through command line
The most popular command However, in some cases when lsb_release is not available, then use the following
linux
finding out package and versions in apt
search available packages with keyword list available versions of a package. For example, if I want to list all available versions for package libcudnn7 Before running this, running apt update is recommended. After finding a specific version that I want to install, then install the packge with a specific version Read more…
error fix
error fix: “OpenBLAS blas_thread_init: pthread_create failed for thread 27 of 36: Resource temporarily unavailable”
Problem When I tried to run a python script using numpy, it gave the following error. Solution found a solution from here from the shell, execute the following
error fix
cd not working in sh script
problem I had a shell script like the following and I was trying to run it with $ sh somescript.sh but it kept failing with the error something liek “cd: no directory”. Solution After resaving the script file with LF instead of CRLF, the script worked. I was using intellij Read more…
linux
solving “‘grub-efi-amd64-signed’ package failed to install into /target/.” error while installing ubuntu 20.04
I encountered the infamous “‘grub–efi–amd64–signed‘ package failed to install into /target/.” error when installing ubuntu 20.04 along with preinstalled windows 10 in my desktop. Here are the setting environments gigabyte mainboard one SSD, one HDD windows 10 already installed on SSD I wanted to install ubuntu 20.04 on the HDD Read more…