This article introduces how to convert to lowercase and uppercase in bash, awk, sed, and tr, and the benchmark results for each. Versions The versions are as follows: OS Ubuntu 20.04.1 LTS bash GNU bash, version 5.0.17(1)-release (x86_64-pc-linux-gnu) gawk GNU Awk 5.0.1, API: 2.0 (GNU MPFR 4.0.2, GNU MP 6.2.0) mawk 1.3.4 20200120 sed sed (GNU sed) 4.7 tr tr (GNU coreutils) 8.30 Convert to lowercase/uppercase bash The documentation says the following:

Do you know how to modify the value of “max open files” for a running process? You can modify that it is using the command “prlimit”(You can also modify more than just “max open files”). docker-prlimit-example makes it easy to try. Run the following commands in order to connect to the docker container where the unicorn process is running. $ git clone https://github.com/tkuchiki/docker-prlimit-example $ cd docker-prlimit-example $ docker build -t prlimit .