Example 01: the File system

On a Mac or Linux system, or on Windows with the WSL or Cygwin installed, try some commands:

Who are you?

whoami

Where in the filesystem are you right now?

pwd

File listing

ls

File listing with switches

l for long form, t for order by last modified, h for show sizes in human-readable units.

ls -lth

Piping output

ls | wc -l

The file system structure

# Show the directory structure (excluding files) for this project
# up to two levels deep. Just use "tree -d -L 2" at the console. 
# I can't use that here without getting some font rendering errors.
find . -type d -maxdepth 2 -print 2>/dev/null | awk '!/\.$/ {for (i=1;i<NF-1;i++){printf("│   ")}print "├── "$NF}'  FS='/'

Moving around

## Enter a directory
cd files
ls

## Move up to parent directory
cd ..
ls

## Move directly to top of home directory
cd ~

## Move back to the previous directory, wherever that was
cd - 
ls

## Move down a path relative to where you are now
cd files/bib
ls

## Move down then back up two levels
cd files/bib
cd ../../
ls

---
title: "Example 01: the File system"
engine: knitr
---

On a Mac or Linux system, or on Windows with the WSL or Cygwin installed, try some commands:


### Who are you?

```{.zsh}
whoami
```


### Where in the filesystem are you right now?

```{.zsh}
pwd
```

### File listing

```{.zsh}
ls
```


### File listing with switches

`l` for long form, `t` for order by last modified, `h` for show sizes in human-readable units.

```{.zsh}
ls -lth
```


### Piping output

```{.zsh}
ls | wc -l
```


### The file system structure

```{.zsh}
# Show the directory structure (excluding files) for this project
# up to two levels deep. Just use "tree -d -L 2" at the console. 
# I can't use that here without getting some font rendering errors.
find . -type d -maxdepth 2 -print 2>/dev/null | awk '!/\.$/ {for (i=1;i<NF-1;i++){printf("│   ")}print "├── "$NF}'  FS='/'
```


### Moving around

```{.zsh}
## Enter a directory
cd files
ls
```

```{.zsh}
## Move up to parent directory
cd ..
ls
```

```{.zsh}
## Move directly to top of home directory
cd ~
```

```{.zsh}
## Move back to the previous directory, wherever that was
cd - 
ls
```

```{.zsh}
## Move down a path relative to where you are now
cd files/bib
ls
```

```{.zsh}
## Move down then back up two levels
cd files/bib
cd ../../
ls
```