Update Linux checklist

resources/linux.md

@@ -7,62 +7,119 @@
 Check your Linux educational progress with the following list:
 
 - [ ] **File System Hierarchy**
-  - [ ] `/`
+  - [ ] `/` (aka root)
   - [ ] `/bin` and `/sbin`
   - [ ] `/opt`
   - [ ] `/usr`
   - [ ] `/var`
   - [ ] `/home`
+  - [ ] `/etc`
+  - [ ] `/proc`
+  - [ ] `/tmp`
 
-  - [ ] Check yourself
+  - [ ] Test
     - [ ] What is '/'?
-    - [ ] What is stored in '/bin'?
+    - [ ] What is stored in '/bin'? what about `/etc`?
     - [ ] What '/home' is usually used for?
     - [ ] What type of files can you find in '/var'?
+    - [ ] What is unique about `/tmp`?
 
 - [ ] **Navigation**
-  - [ ] `pwd` - where am I?
-
-  - [ ] cd
-    - [ ] relative vs. absolute paths
-    - [ ] What will happen when running 'cd -'?
+  - [ ] Commands
+    - [ ] `pwd` - where am I?
+    - [ ] `cd` - change directory
+  - [ ] relative vs. absolute paths
 
-  - [ ] Check yourself
+  - [ ] Test
     - [ ] How to check your current path?
+    - [ ] Where `cd ..` will take you?
+    - [ ] What would be the effect of running `cd .`?
+    - [ ] What will happen when running 'cd -'?
 
 - [ ] **Files**
-  - [ ] Commands
-    - [ ] touch
-    - [ ] rm
-    - [ ] how to remove a directory?
+  - [ ] Types of files
+    - [ ] Regular
+    - [ ] Directory
+    - [ ] Socket
+    - [ ] Block
+    - [ ] Link
 
-  - [ ] `ls` - list files and directories
-    - [ ] `-a` for listing hidden files
-    - [ ] `-l` for list formt
-    - [ ] `-t` order by time
-    - [ ] `-F` better distinguish between regular files and directories
-
-  - [ ] Check yourself
+  - [ ] Commands
+    - [ ] `ls` - list files and directories
+      - [ ] `-a` for listing hidden files
+      - [ ] `-l` for list formt
+      - [ ] `-t` order by time
+      - [ ] `-F` better distinguish between regular files and directories
+    - [ ] `touch` - creating files (original intention is updating timestamp)
+      - [ ] nice to know: `touch file{1..5}`
+    - [ ] `rm` - remove files
+      - [ ] `-r` for recursive
+      - [ ] `-f` to force removal, no questions asked
+    - [ ] `mkdir` - create directories
+      - [ ] `-p` - for creating multiple nested directories
+    - [ ] `rmdir` - remove directories
+    - [ ] `echo` - display a line of text
+    - [ ] `cat` - concatenate files (common usage: read a file)
+    - [ ] `mv` - move files directories (also rename files and directories)
+    - [ ] `cp` - copy a file
+      - [ ] `-r` for recursive (copy a directory)
+
+  - [ ] Test
     - [ ] How to list hidden files?
-    - [ ] What `cd ..` will do?
+    - [ ] How to create an empty new file?
+    - [ ] How to remove a directory?
+    - [ ] How to rename a file?
+    - [ ] How to copy an entire directory with all its files?
 
-- [ ] **I/O redirection**
+- [ ] Commands
+    - [ ] `man` - manual for commands
+    - [ ] `which` - get full path for given command
+    - [ ] `whatis` - one-line manual page descriptions
 
-- [ ] **Network**
-  - [ ] netstat
+- [ ] **I/O redirection**
+  - [ ] File Descriptor
+    - [ ] stdin 0 (input) <
+    - [ ] stdout 1 (output) >
+    - [ ] stderr 2 (error) 2>
+  - [ ] Append >>
+
+  - [ ] Test
+    - [ ] How to redirect output?
+    - [ ] What would be the result of the following command `blop 2> file`?
+
+- [ ] Text Editor (one is enough)
+  - [ ] vim
+    - [ ] `i` to start typing
+    - [ ] `:wq` to exit (or `shit+zz`)
+  - [ ] nano
+  - [ ] emacs
+  - [ ] atom
+  - [ ] sublime
+
+  - [ ] Test (mainly for vim)
+    - [ ] How to remove an entire line?
+    - [ ] How to copy 5 lines?
+    - [ ] How to jump to the end of the line
+    - [ ] How to remove one word
+    - [ ] How to jump to the end of the file
 
 - [ ] **Users**
   - [ ] Commands
     - [ ] useradd
     - [ ] usermod
     - [ ] userdel
     - [ ] who
+
   - [ ] Nice to know commands
     - [ ] lastlog
-  - [ ] Check yourself
+
+  - [ ] Test
     - [ ] how to add a new user?
     - [ ] should you be using your user or root?
 
+- [ ] **Network**
+  - [ ] netstat
+
 - [ ] **Monitoring and performence commands**
     - [ ] top
     - [ ] stat
@@ -84,7 +141,6 @@ Check your Linux educational progress with the following list:
 
 ## Learn Linux
 
-
 Name | Comments
 :------|:------:
 [Linux Journey](https://linuxjourney.com) | Written guides + exercises + quiz