TNT - Tips & Tricks

List all certificates: sudo certbot certificates Create wildcard certificate for domain example.com:  sudo certbot certonly --manual --preferred-challenges dns --server https://acme-v02.api.letsencrypt.org/directory --manual-public-ip-logging-ok -d '*.example.com' -d <example.com> Delete certificate:  sudo certbot delete Get certificate with HTTP challenge, From root folder .well-known/acme-challenge/[Some randome filename from lets encrypt]  certbot certonly --manual --preferred-challenges http --email youremail@mail.com -d example.com -d example.org

DBMS_OUTPUT has different default buffer sizes, depending on your Oracle version. You can increase the buffer up to 1,000,000 using the following PL/SQL statement: DBMS_OUTPUT.ENABLE(1000000); The SQL*Plus statement to achieve the same result is: SET SERVEROUTPUT ON SIZE 1000000 Starting with Oracle release 10g, it is possible to use the following unlimited buffer settings: DBMS_OUTPUT.ENABLE (buffer_size => NULL);

PL/SQL Write BLOB to file (temp file): in my case I have a table with BLOB column, I keep my pdf files inside, and I need to save them in temp directory. This procedure accepts 3 arguments: BLOB, directory name to save into and file name: CREATE OR REPLACE PROCEDURE write_pdf(v_blob IN BLOB, p_directory IN VARCHAR2, p_filename IN VARCHAR2 ) IS v_length INTEGER; v_index INTEGER := 1; v_bytecount INTEGER; v_tempraw RAW(32767); v_file UTL_FILE.file_type; BEGIN v_file := UTL_FILE.fopen(p_directory, p_filename, 'wb', 32767); v_length := DBMS_LOB.getlength(v_blob); WHILE v_index <= v_length LOOP v_bytecount := 32767; DBMS_LOB.read(v_blob, v_bytecount, v_index, v_tempraw); UTL_FILE.put_raw(v_file, v_tempraw); UTL_FILE.fflush(v_file); ...

Work with directories Oracle PL/SQL: Create(add) temp directory on c:\ referenced as DIR_TEMP CREATE DIRECTORY DIR_TEMP AS 'C:\temp'; List all directories by system user: SELECT * FROM all_directories;