https://quicktasks.ismael.casimpan.com/tags/bash/Recent content in bash on IT QuicktasksHugo -- gohugo.ioCopyright © 2018–2022, Ismael Casimpan Jr.; All Rights ReservedMon, 21 Mar 2022 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/check-csv-bom-using-bash/Mon, 21 Mar 2022 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/check-csv-bom-using-bash/ BOM or Byte-Order-Mark is needed by a UTF-8 CSV in order to be opened in Excel (at least for Windows). How to check if said BOM exist using bash? See below: 1~$ head -c3 samplefile.csv | hexdump -C 200000000 ef bb bf |...| 300000003https://quicktasks.ismael.casimpan.com/post/basic-bash-regex/Sat, 05 Mar 2022 22:17:11 +0800https://quicktasks.ismael.casimpan.com/post/basic-bash-regex/ Basic regex operator is =~ with basic syntax 1[[ "string" =~ pattern ]] NOTE pattern is not quoted, only the string. Very basic example when checking if a variable has either values 'running' or 'exited': 1status='running' ## change to 'exited' and '' to see it works 2if [[ "$status" =~ running|exited ]]; then 3echo "Is either running or exited" 4else 5echo "Nope, I don't understand that status" 6fi See stackoverflow posthttps://quicktasks.ismael.casimpan.com/post/use-sqlite-in-bash/Tue, 15 Feb 2022 22:17:11 +0800https://quicktasks.ismael.casimpan.com/post/use-sqlite-in-bash/ 1#!/bin/bash 2sqlite3 test.db "create table n (id INTEGER PRIMARY KEY,f TEXT,l TEXT);" 3sqlite3 test.db "insert into n (f,l) values ('john','smith');" 4sqlite3 test.db "select * from n;" See stackoverflow posthttps://quicktasks.ismael.casimpan.com/post/source-bash-script-only/Thu, 12 Aug 2021 09:10:45 +0800https://quicktasks.ismael.casimpan.com/post/source-bash-script-only/ In some cases, you may need to import the existing environments in bash. Use the following at the top of your script. 1if [ "${BASH_SOURCE[0]}" -ef "$0" ] 2then 3echo "Hey, you should source this script, not execute it!" 4exit 1 5fi See details in https://unix.stackexchange.com/questions/424492/how-to-define-a-shell-script-to-be-sourced-not-run/424498https://quicktasks.ismael.casimpan.com/post/bash_func_module-error/Mon, 09 Apr 2018 00:20:25 +0800https://quicktasks.ismael.casimpan.com/post/bash_func_module-error/ This error is seen as follows: 1sh:module:line1:syntaxerror:unexpectedendoffile2sh:errorimportingfunctiondefinitionfor`BASH_FUNC_module'A lot of discussions has been done about it in https://github.com/drush-ops/drush/issues/2065#issuecomment-227820550 but the fix is made from /etc/php.ini: 1disable_functions = pcntl_exec