linuxkathirvel

How to disable PDF file opening in Chrome browser automatically?

Chrome Version: Version 90.0.4430.85 (Official Build) (64-bit)

Goto Settings->Privacy and Security->Site Settings->Additional Conent Settings->PDF Documents enable Download PDF files instead of automatically opening them in Chrome

linuxkathirvel

How to save a file downloaded from Python requests?

https://stackoverflow.com/questions/44699682/how-to-save-a-file-downloaded-from-requests-to-another-directory https://www.codementor.io/@aviaryan/downloading-files-from-urls-in-python-77q3bs0un

linuxkathirvel

How to upgrade Fedora?

sudo dnf install dnf-plugin-system-upgrade
# Reboot the system after the above command completed.
sudo dnf system-upgrade download --refresh --releasever=33
sudo dnf system-upgrade reboot

# You can remove cached packages by executing 'dnf clean packages'

linuxkathirvel

How to fix "DisallowedHost at / Invalid HTTP_HOST header:. The domain name provided is not valid according to RFC 1034/1035." error in Django?

Solution

• Don't add include proxy_params; in Django application's NGINX configuration file.
• Cross-check the Django application's NGINX configuration. If include proxy_params; line added, remove it.
• proxy_params(/etc/nginx/proxy_params) file have proxy_set_header Host $http_host; line already. It will override proxy_set_header Host $host;

Related notes

1. Security configurations in Django while deploying on production
2. How to fix ERR_TOO_MANY_REDIRECTS issue in Django+Gunicorn+NGINX?

References

linuxkathirvel

Reduce image size in linux

convert source-image.jpg -quality 70% converted-image.jpg

linuxkathirvel

error: skipping "/var/mail/kathirvel" because parent directory has insecure permissions (It's world writable or writable by group which is not "root") Set "su" directive in config file to tell logrotate which user/group should be used for rotation.

Solution

For example: if you are going to configure the logrotate to /var/mail/kathirvel file, it will have the permissions like owner=kathirvel, group=mail. We should mention 'su username groupname' to non-root user's file. The configuration will be like below

/var/mail/kathirvel
{
        rotate 3
        su kathirvel mail
        maxsize 1M
 missingok

linuxkathirvel

How to execute logrotate every hour?

The 'time based'(hourly, daily, weekly, monthly) and 'size' baesd execution frequencies are available in the logrotate.. Logrotate is configurated to run daily default. There is no option to run logrotate like every 5 minutes, 30 minutes. We can configure logrotate to like every 5 minutes, 30 minutes using manualy crontab entry.

Logrotate configuration file of /etc/logrotate.d/rsyslog

/var/log/syslog
{
        rotate 3
        maxsize 5M

linuxkathirvel

How can I create a file with a specific size from a command line?

# To create 700MB file
truncate -s 700M filename.txt

Reference

https://superuser.com/questions/609020/how-can-i-create-a-file-with-a-specific-size-from-a-command-line

linuxkathirvel

How to Check Memory Usage Per Process on Linux?

ps -o pid,user,%mem,command ax | sort -b -k3 -r

linuxkathirvel

How to create OpenVPN connection in KDE Plasma using NetworkManager GUI with .ovpn file?