A shell can send SIGHUP when a terminal session closes. I’m glad nohup starts a command with SIGHUP set to ignored. The shell’s ampersand backgrounds a command and returns the prompt. You can pair it with nohup when a job needs both behaviors. What is the nohup command? The nohup command starts a utility with
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A Linux CAD app can make a 2D drawing or a parametric 3D model. The job matters more than a universal ranking, and that difference interests me. Some tools instead generate solids from code. Choose by the drawing you need to make. What Makes a CAD App Fit Linux? Computer-aided design (CAD) software creates or
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Plain ls omits names that begin with a dot, but -a includes them. I’m fascinated by the other distinction: a long listing’s directory size describes its entry, not the space used by files beneath it. See what ls lists by default. Give ls a directory operand to list entries somewhere else. What is the ls
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I wonder: will Yum remove only the package you name? Its proposed transaction can also include packages that depend on the target or dependencies it considers unused. Examine the Yum remove operation in relation to the installed package set it can change. Notice what the request asks Yum to resolve. What is YUM package removal?
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What does dnf autoremove target? I like the sharp distinction: it targets unneeded dependency packages, not the named application you choose to uninstall. Place DNF’s package work in the context of RPM software management. Trace how DNF resolves dependencies and downloads packages from configured repositories. What is DNF? DNF manages RPM software on distributions such
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Torvalds used MINIX as a Unix-like system to study while developing a separate kernel for his 386 computer. I appreciate how Torvalds asked MINIX users for feedback instead of presenting a finished operating system. That difference answers the creator question more accurately than saying one person wrote every program in a Linux system. Linux names
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A Linux image edit needs an editable project as well as a separate image to share. The canvas beside the Layers dock is the GIMP detail I appreciate. The separate text layer lets you revise a label without changing the photo. Open a local image in GIMP’s canvas to begin the edit. What Is GIMP?
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The poweroff flag makes sudo shutdown -P now an immediate poweroff, while sudo shutdown -r now requests an immediate reboot. I’m intrigued by the sharp difference between rebooting the host and restarting a single service. Find out which host actions shutdown can request. Trace the request to the host state it changes. What is the
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Does GPG delete report.txt after encryption? I’m curious about that separate copy: the original remains readable beside report.txt.gpg. You’ll see what makes a passphrase useful for a private local copy. Follow how GPG uses that passphrase to create a separate encrypted file. What is GPG symmetric encryption? GPG symmetric encryption uses a passphrase to encrypt
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A private-key passphrase prompt is for unlocking your local key, not for supplying the remote account password. I’m hooked by the contrast: SSH may use a key already available to your client without asking for a password. Consider what your computer asks the destination to do when you start a login. The ssh client and
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