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nixCraft Linux / UNIX Newsletter |
| Check and verify md5/sha1/sha256 checksums for MacOS X when I download files Posted: 01 Aug 2018 04:58 PM PDT Malware is becoming more and more common for macOS. I wanted to make sure file I downloaded files such as an ISO image or firmware are safe before install on my system. How do I verify md5 or sha1 or sha256 checksums for my Apple MacOS X when I download files from the Internet? The post Check and verify md5/sha1/sha256 checksums for MacOS X when I download files appeared first on nixCraft. |
| Linux prevent unprivileged users from viewing dmesg command output Posted: 01 Aug 2018 04:56 PM PDT I want to restrict both normal users and root user inside LXD container "hypervisor" from viewing and using dmesg command output. How do I prevent non-root (unprivileged) Linux users from viewing the Linux kernel's log buffer? Can Linux prevent unprivileged users from viewing dmesg command output? The post Linux prevent unprivileged users from viewing dmesg command output appeared first on nixCraft. |
| Ubuntu Linux Change Hostname (computer name) Posted: 01 Aug 2018 04:03 PM PDT I am a new Ubuntu Linux laptop user. I setup my computer name to 'tom' during installation but now I would like to change the computer name to 'jerry'. Can you tell me how do I remove tom and set it to jerry on Ubuntu Linux? How do I change the Ubuntu computer name from 'ubuntu' to 'AvlinStar'? Can you tell me more about Ubuntu Linux change hostname command? The post Ubuntu Linux Change Hostname (computer name) appeared first on nixCraft. |
| How to get octal file permissions on Linux/Unix command line Posted: 01 Aug 2018 04:01 PM PDT I am a new Linux command line user. How do I find file permissions in octal format such as 0644 from the bash command line running on a Linux or Unix operating systems? How can I get the octal permissions for a file? How do I get octal file permissions on Linux/Unix? The post How to get octal file permissions on Linux/Unix command line appeared first on nixCraft. |
| pfSense email notification when fallback WAN connection goes down Posted: 01 Aug 2018 09:22 AM PDT I have two WAN connection. The first WAN connection connects via FTTH modem. The second connection connects via 4G LTE CPE modem. I have configured fallback and load balanced dual WAN connection on my pfSense box. However, once in while the Internet connection either one of the WAN goes down. How can I tell pfSense to send an email notification when fallback (or any) WAN connection goes down? How to configure pfSense email notification when an alert happens? The post pfSense email notification when fallback WAN connection goes down appeared first on nixCraft. |
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