---
title: "Admin's Guide"
url: 'https://kb.stavlib.cz/linux/admins-guide'
markdown: 'https://kb.stavlib.cz/linux/admins-guide.md'
date: '2026-10-26'
description: 'Basic tools and libraries that might be useful apt update && apt upgrade apt install bash-completion && . /etc/bash_completion && echo . /etc/bash_completion >> .bashrc apt install mc net-tools apt-transport-https aptitude wget ca-certificates curl git vlan htop ssh na…'
---

[](#)# Admin's Guide

Basic tools and libraries that might be useful

```bash
apt update && apt upgrade
```

```
apt install bash-completion && . /etc/bash_completion && echo . /etc/bash_completion >> .bashrc
```

```bash
apt install mc net-tools apt-transport-https aptitude wget ca-certificates curl git vlan htop ssh nano sudo dirmngr software-properties-common nfs-common cifs-utils samba-client
```

# Executing multiple commands

( https://unix.stackexchange.com/questions/37069/what-is-the-difference-between-and-when-chaining-commands )

cmd1; cmd2 cmd1 && cmd2

## echo

```
echo #CoChcemeVlozit > soubor.txt
```

- přepíše soubor a vloží pouze #

```
echo #CoChcemeVlozit >> soubor.txt
```

- vloží # na konec souboru

## uzitecne prikazy

Zobraz uživatele

```
cat /etc/passwd
```

Zobraz pouze uživatele, bez dalších informací (jako UID apod.)

```
awk -F':' '{ print $1}' /etc/passwd
```

To check free space | https://shapeshed.com/unix-du/

```
du -chs /var/www
```

##### DATABASE

```
show databases;
```

```
use nameofdatabase;
```

```
show tables;
```

#### SSH

Vytvoření souboru pro klíče, které budou povoleny

```
mkdir .ssh && nano .ssh/authorized_keys
```

Obecně: `ssh-rsa KLIC jmeno@prijmeni`

```
ssh-rsa 1234567890AbCdEf jan@stepanek
```

```
ssh-ed25519 aBcDeF1234567890 stepi@homepc
```

---

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