Overview

Services	Networking	OS	Hardware	Packages	File System	Data
Service Management	Networking Security: ssh, socat	System Management System Status MacOS only Windows only Ubuntu Desktop	Hardware	Package Management Package Compilation	Git File Processing Compression Remote File Access	Text Processing Date & Time Arithemetic

Trouble shooting

Purpose	Command
Verify $PATH by line.	echo $PATH \| tr ':' '\n' echo $PATH \| tr ':' '\n' \| grep 'snap'

Purpose	Command
list with color and suffix for dir and link	ls -FG
list add hidden files only single quote is necessary	find . -name '.*'
delete dist directory recursively except README.md and itself.	find ../../assets/swagger/support ! -path *swagger/support ! -name 'README.md' -delete
delete files that filename leads by - or --	rm -- -X --exclude-from
Set file mtime 2013-09-01 00:00:00	touch -t 201309010000 FILENAME
create ramdisk for Linux (cannot set size)	mount -t ramfs ramfs /usr/local/ramdisk
create ramdisk for Linux/BSD	mount -t tmpfs -o size=128m tmpfs /usr/local/ramdisk
Test I/O performance of 1G write with 4K block	dd if=/dev/zero of=100k.bin bs=4k count=262144
Create file with 100K size	dd if=/dev/zero of=100k.bin bs=1k count=100
Create file with 1M size No warning on disk full	dd if=/dev/zero of=10m.bin bs=1m count=10
Simulate memory consumption (RAM+SWAP)	mkdir /usr/local/ramdisk mount -t tmpfs -o size=2G tmpfs /usr/local/ramdisk dd if=/dev/zero of=/usr/local/ramdisk/fill.bin bs=1m count=2048