I’m trying update (using esp8266 microcontroller), update a DNS record hosted on DigitalOcean, using the API. How do I do to get HTTPS fingerprint using Linux CLI, for use on my code? Answer If you are using ESP (arduino IDE) library WiFiClientSecure.h, you need declare the “const” variable …
Tag: command-line-interface
Validate text file presents expected fields for each data set
If one has a document in this format: You could verify each field exists for each data point manually by scrolling through thousands of lines in a file, but that would be inefficient and time consuming. I have thought about splitting the file and comparing each section using diff, but again, that would be pro…
Bluemix CLI on Linux – websocket: bad handshake
I’m able to push and execute a Java sample application under a Bluemix account but when running the log command through the CLI prompt I receive an error message as shown below: My local platform the runs the CLI is Linux, see the currently installed version: When accessing the log records through the w…
Duplicate MySQL Database in Linux CLI without Exporting an SQL File
I have a MySQL database which I want to duplicate using the Ubuntu Linux CLI without first having to download a MySQL file. I tried the following command: mysql -uroot -e’mysqldump -uroot db_old | mysql -uroot backup db_new;’ But got this error: ERROR 1064 (42000) at line 1: You have an error in y…
Redirecting pv output to file
I’m using the pv utility to asses the speed of log entries being added in a log file, like this: This outputs the addition speed and refreshes every 5 sec: Now, I would like to redirect the current value (“10”) to a file and refresh it every 5s. Not append it, just overwrite the previous val…
Delete files with string found in file – Linux cli
I am trying to delete erroneous emails based on finding the email address in the file via Linux CLI. I can get the files with find . | xargs grep -l email@example.com But I cannot figure out how to delete them from there as the following code doesn’t work. rm -f | xargs find . | xargs grep -l email@exam…