Recently, I restructured my Synology NAS and encrypted all backup shared folders using AES-256 encryption. Therefore I had to find and shorten all files and folders with a certain character length. In general the activation of shared folder encryption is straightforward: Once encrypted, your data will be protected. However, there is a limitation on the […]
Its easy to create a bcrypt hash on commandline with this command: $> htpasswd -nbBC 10 USER PASSWORD Just replace the Placeholder USER and PASSWORD with the corresponding values. The Result should be something like that: USER:$2y$10$gfPbhclOrdjmMLEXSc5CTOWP5aBfjl59hhGvjp/qWXf1FfbQKb5ca The part before “:” is the username. The rest is the bcrypt password hash. The -C parameter specifies […]
To remove all files and folders including hidden files such .gitignore, .htaccess, .git etc. on bash you can use the following command: $> rm -rf /PATH/TO/FOLDER/{*,.*} Is the same as: $> rm -rf ${DOCROOT}/* $> rm -rf ${DOCROOT}/.* But ever shorter. 😉
This is how to wipe a disk via Linux shell: $> sudo shred -v -n2 -z /dev/sdc The command above erases all data on the device /dev/sdc and overrides the data 2Â times. Finally every bit is overridden by zeros. So in sum it takes 3 iterations to wipe a disk via Linux shell. n specifies […]
Today I had to solve the problem, that my wordpress cron throws an exception like this when sending an email via wp_mail function inside a cron scheduled event function. PHP Fatal error: Uncaught exception ‘phpmailerException’ with message ‘Invalid address: (setFrom) wordpress@’ in /var/www/clients/client2/web8/web/wp-base/wp-includes/class-phpmailer.php:1023 Stack trace: #0 /var/www/clients/client2/web8/web/wp-base/wp-includes/pluggable.php(352): PHPMailer->setFrom(‘wordpress@’, ‘WordPress’, false) #1 /var/www/clients/client2/web8/web/wp-base/wp-content/plugins/sheldon_misc/admin/class-sheldon_misc-admin.php(183): wp_mail(‘info@ask-sheldon.com….’, ‘Statusmailing i…’, […]
Recently I tried to remove a big bunch of files from one of my raspberry pies where ffmpeg had swamped my SD-card with too many capture images. So I had to delete x files from folder. I just tried: rm -rf *.jpg But that gave me an “unable to execute /bin/rm: Argument list too long” […]
Lets imagine you want to search for a term in a file and you want to know, how often it can be found in the file. With this command combination you can count search results on bash: $> less xmlfile.xml | grep SearchmeIfYouCan | wc -l This is how this way to count search results […]
If you want to output a CSV file on Linux shell, you could just open it with less, cat or nano (un-formatted CSV output): $> less mydummyfile.csv $> cat mydummyfile.csv $> nano mydummyfile.csv The problem with this approach is, that you will get an unformatted ugly chunk of characters like that: A much better way is it, […]
You can connect to an SFTPÂ server via keyfile like that: $> sftp -v -o IdentityFile=”/PATH/TO/PUBLICKEYFILE(id_rsa)” -o Port=”10022″ user@host
To Rename file to upper case or lower case (* == file selector): Convert to lower case file names Convert to upper case
