Electric Grimoire

Disk

Show disk usage: df -h

List filesizes: du -sh * | sort -h

Show disks and mountpoints: lsblk

Mount ntfs partition in read/write mode: sudo mount -t ntfs -o rw,remount <device> <directory>. Must unmount first if already mounted.

Ssh

Connect: ssh [-p <port>] [username@]<ip>

Copy files to: scp [-P <port>] <filepath> [username@]<ip>:<filepath>

Copy files from: scp [-P <port>] [username@]<ip>:<filepath> <filepath>

Run command: ssh [-p <port>] [username@]<ip> <command>

Specify hostnames in /etc/ssh/ssh_config. They can be used in place of ip addresses.

Host <name>
    HostName <ip>
    Port <port>

Git

Clone: git clone <url>

Pull: git pull

Add: git add <path>

Commit: git commit

Push: git push

List branches, local and remote: git branch -a

Switch branches: git checkout <branch>

Create a branch: git branch <name>. You'll still need to switch to it afterwards.

List previous commits: git log --oneline

Revert to previous commit: git checkout <hash> .

Clone with submodules: git clone --recurse-submodules <url>

Clone submodules later: git submodule update --init --recursive

Submodules are like their own repos. You can cd inside and switch branches, push/pull, etc.

Apt

Fix interrupted upgrades: sudo dpkg --configure -a

Make & CMake

Makefile macro expanding to rule's target: $@

Makefile macro expanding to rule's prerequisites: $^

For CMake, make sure you're inside the ./build/ directory.

Configure: cmake ..

Build: cmake --build .

Graphical mode: cmake-gui

Curses mode: ccmake

C Tricks

if (*c >= '0' && *c <= '9') {
    return *c - '0';
}

Custom assert message: assert(<condition> && "message");

Vim

Copy selection to system clipboard: "*Y

Paste from system clipboard: "*p

Fix indentation of entire file: gg=G

Save with sudo: :w !sudo tee %

System

Show overview: inxi -F

Images

Remove EXIF data: exiftool -all= -overwrite_original *.jpg

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