Start splitting filesystem

Author: cirosantilli

README.md

@@ -56,14 +56,19 @@ Pagers:
 - [more](more.md)
 - [pg](pg.md)
 
-File and directories:
+Files, directories, partitions:
 
+- [badblocks](badblocks.md)
+- [blkid](blkid.md)
 - [cp](cp.sh)
 - [du](du.md)
+- [e2fsck](e2fsck.md)
+- [e2fsprogs](e2progs.md)
 - [fdupes](fdupes.md)
 - [find](find.md)
 - [locate](locate.md)
 - [ls](ls.md)
+- [lsblk](lsblk.md)
 - [Swap partition](swap-partition.md)
 - [tree](tree.md)
 

badblocks.md

@@ -0,0 +1,13 @@
+# badblocks
+
+e2fsprogs package.
+
+Most useful invocation:
+
+	badblocks -nvs /dev/sdb
+
+- `-n`: non-destructive read-write mode. The default is non-destructive read-only.
+- `-s`: show progress
+- `-v`: verbose information
+
+The output of `badblocks -v` can be used as the input of `e2fsck -l` to mark some blocks as bad and not use them.

blkid.md

@@ -0,0 +1,19 @@
+# blkid
+
+`util-linux` package.
+
+Get UUID, label and filesystem type for all partitions
+
+    sudo blkid
+
+Sample output:
+
+	/dev/sda2: LABEL="DATA" UUID="E4EEDB25EEDAEF34" TYPE="ntfs"
+	/dev/sdb1: LABEL="ESP" UUID="9E91-F4F8" TYPE="vfat"
+	/dev/sdb2: LABEL="DIAGS" UUID="ECC5-8CEC" TYPE="vfat"
+	/dev/sdb4: LABEL="WINRETOOLS" UUID="0058C6EB58C6DE92" TYPE="ntfs"
+	/dev/sdb5: LABEL="OS" UUID="4C38CCBD38CCA6F4" TYPE="ntfs"
+	/dev/sdb6: LABEL="PBR Image" UUID="C2CE5FDBCE5FC677" TYPE="ntfs"
+	/dev/sdb7: UUID="3fabbe75-0c62-4705-a3ad-4e87c5dcc143" TYPE="ext4"
+	/dev/sdb8: UUID="56886cc6-e247-488a-9acf-a07a99cfa3ca" TYPE="ext4"
+	/dev/sdb9: UUID="bbc2c9bf-4846-44d1-81c0-eade6d2dcefb" TYPE="swap"

e2fsck.md

@@ -0,0 +1,8 @@
+# e2fsck
+
+Black list bad blocks so that the OS will not use them:
+
+	sudo badblocks -v /dev/sdb > /tmp/bad-blocks.txt
+	sudo e2fsck -l /tmp/bad-blocks.txt /dev/sdb
+
+TODO: is black-listing a feature of ext filesystems?

e2fsprogs.md

@@ -0,0 +1,13 @@
+# e2fsprogs
+
+Library of ext filesystem utilities.
+
+<http://en.wikipedia.org/wiki/E2fsprogs>
+
+Contains:
+
+- `badblocks`
+- `blkid`
+- `e2fsck`
+
+Present by default on almost all Linux distributions.

eclipse.md

@@ -67,6 +67,8 @@ Navigate in editor and its tabs:
 
 -   `Ctrl + Shift + R`: find files.
 
+-   `Ctrl + Shift + G`: find where the id (class, method, etc.) under the cursor is used.
+
 -   `Ctrl + O`: dropdown filter jump to method definition in current file
 
     Search entire

filesystem.md

@@ -371,52 +371,6 @@ CD DVD.
 
 A SanDisk SD card had a device named `mmcblk0`.
 
-### lsblk
-
-List block devices, including those which are not mounted.
-
-    sudo lsblk
-
-Sample output:
-
-    NAME    MAJ:MIN RM  SIZE   RO TYPE MOUNTPOINT
-    sda     8:0     0   465.8G 0  disk
-    |-sda1  8:1     0    1.5G  0  part
-    |-sda2  8:2     0   93.2G  0  part /media/win7
-    |-sda3  8:3     0   13.7G  0  part
-    |-sda4  8:4     0     1K   0  part
-    |-sda5  8:5     0   338.1G 0  part /
-    |-sda6  8:6     0    3.7G  0  part [SWAP]
-    `-sda7  8:7     0   15.6G  0  part
-    sdb     8:16    0   931.5G 0  disk
-    `-sdb1  8:17    0   931.5G 0  part /media/ciro/DC74FA7274FA4EB0
-
-`-f`: show mostly information on filesystems:
-
-    sudo lsblk -f
-
-Sample output:
-
-    NAME  FSTYPE LABEL      MOUNTPOINT
-    sda
-    |-sda1 ntfs  SYSTEM_DRV
-    |-sda2 ntfs  Windows7_OS   /media/win7
-    |-sda3 ntfs  Lenovo_Recovery
-    |-sda4
-    |-sda5 ext4          /
-    |-sda6 swap          [SWAP]
-    `-sda7 ext4
-    sdb
-    `-sdb1 ntfs          /media/ciro/DC74FA7274FA4EB0
-
-`-o`: select which columns you want exactly. Most useful information for humans:
-
-    sudo lsblk -o NAME,FSTYPE,MOUNTPOINT,LABEL,UUID,SIZE
-
-`-n`: don't output header with column names. Good way to get information computationally. E.g., get UUID of `/dev/sda1`:
-
-    sudo lsblk -no UUID /dev/sda1
-
 ## UUID
 
 Unique identifier for a partition. Field exists in ext and NTFS.
@@ -433,16 +387,6 @@ Get all devices:
 
     sudo lsblk -no UUID /dev/sda1
 
-## blkid
-
-`util-linux` package.
-
-Get UUID, label and filesystem type for all partitions:
-
-    sudo blkid
-
-## Label
-
 An ext partitions concept.
 
 Determines the mount name for the partition.

lsblk.md

@@ -0,0 +1,45 @@
+# lsblk
+
+List block devices, including those which are not mounted.
+
+    sudo lsblk
+
+Sample output:
+
+    NAME    MAJ:MIN RM  SIZE   RO TYPE MOUNTPOINT
+    sda     8:0     0   465.8G 0  disk
+    |-sda1  8:1     0    1.5G  0  part
+    |-sda2  8:2     0   93.2G  0  part /media/win7
+    |-sda3  8:3     0   13.7G  0  part
+    |-sda4  8:4     0     1K   0  part
+    |-sda5  8:5     0   338.1G 0  part /
+    |-sda6  8:6     0    3.7G  0  part [SWAP]
+    `-sda7  8:7     0   15.6G  0  part
+    sdb     8:16    0   931.5G 0  disk
+    `-sdb1  8:17    0   931.5G 0  part /media/ciro/DC74FA7274FA4EB0
+
+`-f`: show mostly information on filesystems:
+
+    sudo lsblk -f
+
+Sample output:
+
+    NAME  FSTYPE LABEL      MOUNTPOINT
+    sda
+    |-sda1 ntfs  SYSTEM_DRV
+    |-sda2 ntfs  Windows7_OS   /media/win7
+    |-sda3 ntfs  Lenovo_Recovery
+    |-sda4
+    |-sda5 ext4          /
+    |-sda6 swap          [SWAP]
+    `-sda7 ext4
+    sdb
+    `-sdb1 ntfs          /media/ciro/DC74FA7274FA4EB0
+
+`-o`: select which columns you want exactly. Most useful information for humans:
+
+    sudo lsblk -o NAME,FSTYPE,MOUNTPOINT,LABEL,UUID,SIZE
+
+`-n`: don't output header with column names. Good way to get information computationally. E.g., get UUID of `/dev/sda1`:
+
+    sudo lsblk -no UUID /dev/sda1