add mac folder (empty) and Linux folder with mounting cheat sheet

danzek · Apr 12, 2018 · 2771a78 · 2771a78
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diff --git a/Operating Systems/mac*OS*/MountingStuff.md b/Operating Systems/mac*OS*/MountingStuff.md
@@ -0,0 +1,83 @@
+# Mounting Stuff
+
+*This is just a bunch of disjointed notes with various mount commands I use that I am putting here to make it easier for me to find them in the future. Nothing too fancy to see here. If you find it helpful, great!*
+
+## Mount Windows Share
+
+What seems to be missing from online examples that I seem to always need is `vers=2.0`. This isn't needed in many cases, so I usually try it without and then try again with it if it failed. The password can also be provided in the command by adding `password=PASSWORD` but I'm not generally a fan of putting passwords in my bash history so I prefer to let it prompt me.
+
+    # mount -t cifs -o domain=DOMAIN,username=USERNAME,vers=2.0 //HOSTNAME/shared_folder /mnt/target
+
+## Mount LVM Volumes from VMDK Files
+
+Create a mount point, loopback device, and view partitions present:
+
+    # mkdir /mnt/target
+    # losetup /dev/loop0 mysystem-flat.vmdk
+    # fdisk -l /dev/loop0
+
+Expected output should be similar to the following:
+
+    Disk /dev/loop0: 20 GiB, 21474836480 bytes, 41943040 sectors
+    Units: sectors of 1 * 512 = 512 bytes
+    Sector size (logical/physical): 512 bytes / 512 bytes
+    I/O size (minimum/optimal): 512 bytes / 512 bytes
+    Disklabel type: dos
+    Disk identifier: 0x000507d4
+
+    Device       Boot   Start      End  Sectors  Size Id Type
+    /dev/loop0p1 *       2048  1026047  1024000  500M 83 Linux
+    /dev/loop0p2      1026048 41943039 40916992 19.5G 8e Linux LVM
+
+Next calculate the offsets in bytes instead of sectors by multiplying the starting sectors by the sector size. Then create a loopbac device from each offset:    
+
+    # echo "2048*512" | bc
+    1048576
+
+    # losetup -o 1048576 /dev/loop1 mysystem-flat.vmdk
+
+    # echo "102648*512" | bc
+    525336576
+
+    # losetup -o 525336576 /dev/loop2 mysystem-flat.vmdk
+
+Then scan all devices for volume groups:
+
+    # vgscan
+      Reading all physical volumes.  This may take a while...
+      Found volume group "centos" using metadata type lvm2
+
+Next get information on physical and logical volumes:
+
+    # pvs
+      PV         VG     Fmt  Attr PSize  PFree 
+      /dev/loop2 centos lvm2 a--  19.51g 40.00m
+
+    # lvs
+      LV   VG     Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
+      root centos -wi-a----- 17.47g                                                    
+      swap centos -wi-a-----  2.00g
+
+Mount the logical volumes. Sometimes the home folder is in a separate vmdk file and needs to be mounted in its appropriate location under the main volume:
+
+    # mount -o ro,norecovery /dev/centos/root /mnt/target
+    # ls /mnt/target
+    bin   dev  home  lib64  mnt  proc  run   srv  tmp  var
+    boot  etc  lib   media  opt  root  sbin  sys  usr
+
+**Dismounting LVM Volume(s)**
+
+To dismount the volumes, do the following (keeping in mind you may need to first dismount "sub-mounted" volumes such as the home folder or other paths from separate vmdk files, etc.:
+
+    # umount /mnt/target
+    # vgchange -a n centos
+      0 logical volume(s) in volume group "centos" now active
+
+    # losetup -D
+
+------------------------------
+
+### Credits
+
+Many thanks to [Steve Gibson](https://about.me/sgibson) for making a cheat sheet for mounting LVM volumes that I've more or less just reproduced here.
+
diff --git a/README.md b/README.md
@@ -5,6 +5,10 @@ Various notes/memoranda.
 ## Table of Contents
 
 - Operating Systems
+  - Linux
+    - [Mounting Stuff](Operating%20Systems/Linux/MountingStuff.md)
+  - mac\*OS\*
+    - Coming soon in a browser near you....
   - Windows
     - [Background Intelligent Transfer Service (BITS)](Operating%20Systems/Windows/BITS.md)
     - [CLSID Keys](Operating%20Systems/Windows/CLSID.md)
@@ -20,6 +24,7 @@ We may eventually move the NTFS content in the Windows folder to a `File Systems
 | ---- | ----- | ------ | ------- |
 | Dan O'Day | d@4n68r.com | [danzek](https://github.com/danzek) | [@4n68r](https://twitter.com/4n68r) |
 | Adam Witt | accidentalassist@gmail.com | [PoorBillionaire](https://github.com/PoorBillionaire) | [@_TrapLoop](https://twitter.com/_TrapLoop)
+| Steve Gibson | steve@stevegibson.com | [sg](https://github.com/sg) | [stevegibson](https://www.twitter.com/stevegibson) |
 
 Contributions are welcome. Contact me, create an issue, and/or fork this code and create a pull request.