diff --git a/os/lunux_windows_commands.md b/os/lunux_windows_commands.md
index 64db97e..8168a83 100755
--- a/os/lunux_windows_commands.md
+++ b/os/lunux_windows_commands.md
@@ -7,77 +7,61 @@ This lists similar commands between Windows and Unix command lines.
 
 To get help on a Windows command, use the `/?` option, for example `date /?`.
 
-| ----- |
-| Windows command |  Unix command |  Notes |
-| `arp` |  [`arp][1]` |   |
-| `assign` |  [`ln][2]` |  Create a file link |
-| `assign` |  [`ln][2] -s` |  On Unix, a directory may not have multiple links, so instead a symbolic link must be created with `ln -s`. |
-| `assoc` |  [`file][3]` |   |
-| `at` |  [`at][4]
-[batch][5]
-[cron][6]` |   |
-| `attrib` |  [`chown][7]
-[chmod][8]` |  Sets ownership on files and directories |
-| `cd` |  [`cd][9]` |  On Windows, `cd` alone prints the current directory, but on Unix `cd` alone returns the user to his home directory. |
-| `cd` |  [`pwd][10]` |  On Windows, **cd** alone prints the current directory. |
-| `chkdsk` |  [`fsck][11]` |  Checks filesystem and repairs filesystem corruption on hard drives. |
-| `cls` |  [`clear][12]` |  Clear the terminal screen |
-| `copy` |  [`cp][13]` |   |
-| `date
-time` |  [`date][14]` |  `Date` on Unix prints the current date and time. `Date` and `time` on Windows print the date and time respectively, and prompt for a new date or time. |
-| `del` |  [`rm][15]` |   |
-| `deltree` |  [`rm][15] -r` |  Recursively deletes entire directory tree |
-| `dir` |  [`ls][16]` |  "dir" also works on some versions of Unix. |
-| `doskey /h
-F7 key` |  [`history][17]` |  The Unix `history` is part of the Bash shell. |
-| `edit` |  `vi
-emacs
-etc.` |  `edit` brings up a simple text editor in Windows. On Unix, the environment variable `EDITOR` should be set to the user's preferred editor. |
-| `exit` |  `[exit][18]
-Control-D` |  On Unix, pressing the control key and D simultaneously logs the user out of the shell. |
-| `explorer` |  `nautilus
-etc.` |  The command `explorer` brings up the file browser on Windows. |
-| `fc` |  `[diff][19]` |   |
-| `find` |  `[grep][20]` |   |
-| `ftp` |  `[ftp][21]` |   |
-| `help` |  `[man][22]` |  "help" by itself prints all the commands |
-| `hostname` |  `[hostname][23]` |   |
-| `ipconfig /all` |  `[ifconfig][24] -a` |  The /all option lets you get the MAC address of the Windows PC |
-| `mem` |  `[top][25]` |  Shows system status |
-| `mkdir` |  `[mkdir][26]` |   |
-| `more` |  `[more][27]
-[less][28]` |   |
-| `move` |  `[mv][29]` |   |
-| `net session` |  `[w][30]
-[who][31]` |   |
-| `net statistics` |  `[uptime][32]` |   |
-| `nslookup` |  `[nslookup][33]` |   |
-| `ping` |  `[ping][34]` |   |
+
+| Windows command | Unix command | Notes |
+| --- | --- | --- |
+| `arp` |  [`arp`][1] |   |
+| `assign` |  [`ln`][2] |  Create a file link |
+| `assign` |  [`ln -s`][2] |  On Unix, a directory may not have multiple links, so instead a symbolic link must be created with `ln -s`. |
+| `assoc` |  [`file`][3] |   |
+| `at` |  [`at`][4] [`batch`][5] [`cron`][6] |   |
+| `attrib` |  [`chown`][7] [`chmod`][8] |  Sets ownership on files and directories |
+| `cd` |  [`cd`][9] |  On Windows, `cd` alone prints the current directory, but on Unix `cd` alone returns the user to his home directory. |
+| `cd` |  [`pwd`][10] |  On Windows, **cd** alone prints the current directory. |
+| `chkdsk` |  [`fsck`][11] |  Checks filesystem and repairs filesystem corruption on hard drives. |
+| `cls` |  [`clear`][12] |  Clear the terminal screen |
+| `copy` |  [`cp`][13] |   |
+| `date` `time` |  [`date`][14] |  `Date` on Unix prints the current date and time. `Date` and `time` on Windows print the date and time respectively, and prompt for a new date or time. |
+| `del` |  [`rm`][15] |   |
+| `deltree` |  [`rm -r`][15] |  Recursively deletes entire directory tree |
+| `dir` |  [`ls`][16] |  "dir" also works on some versions of Unix. |
+| `doskey /h` `F7 key` |  [`history`][17] |  The Unix `history` is part of the Bash shell. |
+| `edit` |  `vi` `emacs` `etc` |  `edit` brings up a simple text editor in Windows. On Unix, the environment variable `EDITOR` should be set to the user's preferred editor. |
+| `exit` |  [`exit`][18] `Control-D` |  On Unix, pressing the control key and D simultaneously logs the user out of the shell. |
+| `explorer` |  `nautilus` `etc.` |  The command `explorer` brings up the file browser on Windows. |
+| `fc` |  [`diff`][19] |   |
+| `find` |  [`grep`][20] |   |
+| `ftp` |  [`ftp`][21] |   |
+| `help` |  [`man`][22] |  "help" by itself prints all the commands |
+| `hostname` |  [`hostname`][23] |   |
+| `ipconfig /all` |  [`ifconfig -a`][24] |  The /all option lets you get the MAC address of the Windows PC |
+| `mem` |  [`top`][25] |  Shows system status |
+| `mkdir` |  [`mkdir`][26] |   |
+| `more` |  [`more`][27] [`less`][28] |   |
+| `move` |  [`mv`][29] |   |
+| `net session` |  [`w`][30] [`who`][31] |   |
+| `net statistics` |  [`uptime`][32] |   |
+| `nslookup` |  [`nslookup`][33] |   |
+| `ping` |  [`ping`][34] |   |
 | `print` |  `lpr` |  Send a file to a printer. |
-| `reboot
-shutdown -r` |  `[shutdown][35] -r` |   |
+| `reboot` `shutdown -r` |  [`shutdown -r`][35] |   |
 | `regedit` |  `edit /etc/*` |  The Unix equivalent of the Windows registry are the files under `/etc` and `/usr/local/etc`. These are edited with a text editor rather than with a special-purpose editing program. |
-| `rmdir` |  `[rmdir][36]` |   |
-| `rmdir /s` |  `[rm][15] -r` |  Windows has a y/n prompt. To get the prompt with Unix, use `rm -i`. The `i` means "interactive". |
-| `set` |  `[env][37]` |
-
-`Set` on Windows prints a list of all environment variables. For individual environment variables, set  is the same as echo $ on Unix.
-
- |
+| `rmdir` |  [`rmdir`][36] |   |
+| `rmdir /s` |  [`rm -r`][15] |  Windows has a y/n prompt. To get the prompt with Unix, use `rm -i`. The `i` means "interactive". |
+| `set` |  [`env`][37] | `Set` on Windows prints a list of all environment variables. For individual environment variables, set  is the same as echo $ on Unix. |
 | `set Path` |  `echo $PATH` |  Print the value of the environment variable using `set` in Windows. |
-| `shutdown` |  `[shutdown][35]` |  Without an option, the Windows version produces a help message |
-| `shutdown -s` |  `[shutdown][35] -h` |  Also need -f option to Windows if logged in remotely |
-| `sort` |  `[sort][38]` |   |
+| `shutdown` |  [`shutdown`][35] |  Without an option, the Windows version produces a help message |
+| `shutdown -s` |  [`shutdown -h`][35] |  Also need -f option to Windows if logged in remotely |
+| `sort` |  [`sort`][38] |   |
 | `start` |  `&` |  On Unix, to start a job in the background, use `command &`. On Windows, the equivalent is `start command`. See [How to run a Windows command as a background job like Unix ?][39]. |
-| `systeminfo` |  `[uname][40] -a` |   |
-| `tasklist` |  `[ps][41]` |  "tasklist" is not available on some versions of Windows. See also [this article on getting a list of processes in Windows using Perl][42] |
+| `systeminfo` |  [`uname -a`][40] |   |
+| `tasklist` |  [`ps`][41] |  "tasklist" is not available on some versions of Windows. See also [this article on getting a list of processes in Windows using Perl][42] |
 | `title` |  `?` |  In Unix, changing the title of the terminal window is possible but complicated. Search for "change title xterm". |
-| `tracert` |  `[traceroute][43]` |   |
-| `tree` |  `[find][44]
-[ls][16] -R` |  On Windows, use tree | find "string" |
-| `type` |  `[cat][45]` |   |
-| `ver` |  `[uname][40] -a` |   |
-| `xcopy` |  `[cp][13] -R` |  Recursively copy a directory tree |
+| `tracert` |  [`traceroute`][43] |   |
+| `tree` |  [`find`][44] [`ls -R`][16] |  On Windows, use tree \| find "string" |
+| `type` |  [`cat`][45] |   |
+| `ver` |  [`uname -a`][40] |   |
+| `xcopy` |  [`cp -R`][13] |  Recursively copy a directory tree |
 
 Links open in a separate window. The links on the Unix commands go to an online version of the FreeBSD manual page.