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Linux
100 questions
Which distribution to choose?
•
Ubuntu — for beginners.
•
Linux Mint — even easier.
•
Fedora — modern technologies.
•
Arch — for advanced users.
•
For server: Ubuntu Server, Debian.
How to manage packages?
•
Ubuntu/Debian: apt update && apt upgrade.
•
apt install package.
•
Fedora: dnf install package.
•
Arch: pacman -S package.
•
snap, flatpak — universal.
Basic terminal commands?
•
ls — list files.
•
cd — change directory.
•
cp, mv, rm — copy, move, delete.
•
sudo — execute as root.
•
man command — help.
How to give file permissions?
•
chmod +x script.sh — execute.
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chmod 755 file — rwxr-xr-x.
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chown user:group file — owner.
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Numbers: 4=read, 2=write, 1=execute.
•
755 = rwxr-xr-x.
How to set up SSH?
•
ssh-keygen — create keys.
•
ssh-copy-id user@server — copy public key.
•
ssh user@server — connect.
•
Disable password login in sshd_config.
•
Change port from 22.
Linux: how to set up environment (shell, dotfiles, aliases)?
Start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: how to manage systemd services and journalctl logs?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to work with network, firewall, and security?
Answer for "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to automate tasks (cron, bash, Ansible)?
For "Linux": it is useful to look for primary sources (documentation, release notes) and reproduce the problem with a minimal example.
Linux: Question №10
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to set up the environment (shell, dotfiles, aliases)?
For "Linux" it's better to use simple, supported solutions. Complexity should provide measurable benefits.
Linux: how to manage systemd services and journalctl logs?
For the "Linux" topic, start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: how to work with the network, firewall, and security?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to automate tasks (cron, bash, Ansible)?
Answer about "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: Question №15
For "Linux" it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to set up the environment (shell, dotfiles, aliases)?
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to manage systemd services and journalctl logs?
For "Linux" it is better to use simple, supported solutions. Complexity should provide measurable benefits.
Linux: how to work with the network, firewall, and security?
For the "Linux" topic, start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: how to automate tasks (cron, bash, Ansible)?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: question №20
Answer on «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to set up the environment (shell, dotfiles, aliases)?
For «Linux»: it is useful to find the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to manage systemd services and journalctl logs?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to work with network, firewall, and security?
For «Linux», it is better to use simple, supported solutions. Complexity should provide measurable benefits.
Linux: how to automate tasks (cron, bash, Ansible)?
On the «Linux» topic, start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: question №25
Practice for «Linux»: create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of «mystical» problems.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Answer on «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to manage systemd services and journalctl logs?
For «Linux»: it is useful to find the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to work with network, firewall, and security?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to automate tasks (cron, bash, Ansible)?
For «Linux», it is better to use simple, supported solutions. Complexity should provide measurable benefits.
Linux: Question №30
Start with the requirements on the topic "Linux": what should work, what are the limitations regarding budget/performance/security. Then choose a solution.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to manage systemd services and journal logs with journalctl?
Answer on "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to work with network, firewall, and security?
For "Linux": it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to automate tasks (cron, bash, Ansible)?
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: Question №35
For "Linux", it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Start with the requirements on the topic "Linux": what should work, what are the limitations regarding budget/performance/security. Then choose a solution.
Linux: how to manage systemd services and journal logs with journalctl?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to work with network, firewall, and security?
Answer on "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to automate tasks (cron, bash, Ansible)?
For "Linux": it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: question №40
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to set up the environment (shell, dotfiles, aliases)?
For "Linux" it's better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to manage systemd services and journalctl logs?
For the "Linux" topic, start with requirements: what should work, what are the constraints regarding budget/performance/security. Then choose a solution.
Linux: how to work with network, firewall, and security?
Practical for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to automate tasks (cron, bash, Ansible)?
Answer about "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: question №45
For "Linux" it is useful to find the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to set up the environment (shell, dotfiles, aliases)?
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to manage systemd services and journalctl logs?
For "Linux" it's better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to work with network, firewall, and security?
For the "Linux" topic, start with requirements: what should work, what are the constraints regarding budget/performance/security. Then choose a solution.
Linux: how to automate tasks (cron, bash, Ansible)?
Practical for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: Question №50
Answer on «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to set up the environment (shell, dotfiles, aliases)?
For «Linux»: it’s useful to find the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to manage systemd services and journalctl logs?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to work with the network, firewall, and security?
For «Linux», it’s better to use simple, supported solutions. Complexity should provide measurable benefits.
Linux: how to automate tasks (cron, bash, Ansible)?
For «Linux», start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: Question №55
Practice for «Linux»: create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of «mystical» problems.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Answer on «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to manage systemd services and journalctl logs?
For «Linux»: it’s useful to find the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to work with the network, firewall, and security?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to automate tasks (cron, bash, Ansible)?
For «Linux», it’s better to use simple, supported solutions. Complexity should provide measurable benefits.
Linux: Question №60
Start with the requirements on the topic "Linux": what should work, what are the limitations in terms of budget/performance/security. Then choose a solution.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to manage systemd services and journalctl logs?
Answer for "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to work with the network, firewall, and security?
For "Linux": it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to automate tasks (cron, bash, Ansible)?
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. It saves hours.
Linux: Question №65
For "Linux", it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Start with the requirements on the topic "Linux": what should work, what are the limitations in terms of budget/performance/security. Then choose a solution.
Linux: how to manage systemd services and journalctl logs?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to work with the network, firewall, and security?
Answer for "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to automate tasks (cron, bash, Ansible)?
For "Linux": it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: question №70
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to set up the environment (shell, dotfiles, aliases)?
For «Linux», it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to manage systemd services and journalctl logs?
For «Linux», start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: how to work with network, firewall, and security?
Practice for «Linux»: create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of «mystical» problems.
Linux: how to automate tasks (cron, bash, Ansible)?
Answer about «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: question №75
For «Linux», it is useful to find the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to set up the environment (shell, dotfiles, aliases)?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to manage systemd services and journalctl logs?
For «Linux», it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to work with network, firewall, and security?
For «Linux», start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: how to automate tasks (cron, bash, Ansible)?
Practice for «Linux»: create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of «mystical» problems.
Linux: question №80
Answer on «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to set up the environment (shell, dotfiles, aliases)?
For «Linux»: it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to manage systemd services and journalctl logs?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to work with network, firewall, and security?
For «Linux», it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to automate tasks (cron, bash, Ansible)?
For «Linux», start with requirements: what should work, what are the constraints on budget/performance/security. Then choose a solution.
Linux: question №85
Practice for «Linux»: create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of «mystical» problems.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Answer on «Linux»: updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to manage systemd services and journalctl logs?
For «Linux»: it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to work with network, firewall, and security?
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: how to automate tasks (cron, bash, Ansible)?
For «Linux», it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: question №90
Start with the requirements on the topic "Linux": what should work, what are the limitations in terms of budget/performance/security. Then choose a solution.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to manage systemd services and journalctl logs?
Answer about "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to work with the network, firewall, and security?
For "Linux": it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: how to automate tasks (cron, bash, Ansible)?
If the question is about "Linux", start with diagnostics: log, version, reproduction steps. This saves hours.
Linux: question №95
For "Linux", it is better to use simple, supported solutions. Complexity should bring measurable benefits.
Linux: how to set up the environment (shell, dotfiles, aliases)?
Start with the requirements on the topic "Linux": what should work, what are the limitations in terms of budget/performance/security. Then choose a solution.
Linux: how to manage systemd services and journalctl logs?
Practice for "Linux": create a checklist (installation, configuration, backup, updates) and go through it once — this reduces the number of "mystical" problems.
Linux: how to work with the network, firewall, and security?
Answer about "Linux": updates and backups are more important than fine-tuning. Automate backups and enable 2FA.
Linux: how to automate tasks (cron, bash, Ansible)?
For "Linux": it is useful to look for the original source (documentation, release notes) and reproduce the problem with a minimal example.
Linux: question №100
If the question is about «Linux», start with diagnostics: log, version, reproduction steps. This saves hours.