--- a/avr.rst	Tue Nov 02 10:30:40 2010 +0200
+++ b/avr.rst	Thu Nov 04 17:59:16 2010 +0200
@@ -33,14 +33,22 @@
 
 *** avr-libc.
 
+  $ sudo apt-get install avr-libc
+
   http://www.nongnu.org/avr-libc
                 home page
 
-** avr-binutils.
+** binutils-avr.
+
+  $ sudo apt-get install binutils-avr
+
+** gcc-avr.
 
-** avr-gcc.
+  $ sudo apt-get install gcc-avr
 
-** avr-gdb.
+** gdb-avr.
+
+  $ sudo apt-get install gdb-avr
 
 * Simulator.
 

--- a/fs.rst	Tue Nov 02 10:30:40 2010 +0200
+++ b/fs.rst	Thu Nov 04 17:59:16 2010 +0200
@@ -42,6 +42,55 @@
   http://msdn.microsoft.com/en-us/library/aa365247.aspx
                 Naming Files, Paths, and Namespaces
 
+* Block device attributes.
+
+** How get UUID and label?
+
+Include UUID (Universally Unique Identifier) and labels.
+
+  $ ls -l /dev/disk/by-uuid/
+lrwxrwxrwx 1 root root 10 2010-11-01 23:41 46B6-1FD4 -> ../../sdb2
+lrwxrwxrwx 1 root root 10 2010-11-01 23:41 4C30299030298256 -> ../../sda1
+
+  $ ls -l /dev/disk/by-label/
+lrwxrwxrwx 1 root root 10 2010-11-01 23:41 bin -> ../../sda3
+lrwxrwxrwx 1 root root 10 2010-11-01 23:41 inst -> ../../sda2
+lrwxrwxrwx 1 root root 10 2010-11-01 23:41 media -> ../../sdc5
+
+  $ sudo vol_id /dev/dm-2
+ID_FS_USAGE=filesystem
+ID_FS_TYPE=ext3
+ID_FS_VERSION=1.0
+ID_FS_UUID=f7484fc9-75ec-4e46-8539-50b1e371b7ef
+ID_FS_UUID_ENC=f7484fc9-75ec-4e46-8539-50b1e371b7ef
+ID_FS_LABEL=
+ID_FS_LABEL_ENC=
+ID_FS_LABEL_SAFE=
+
+  $ /sbin/blkid     ## from 'e2fsprogs' package
+/dev/sdc2: UUID="46B6-1FD4" TYPE="vfat"
+/dev/sdb2: TYPE="ntfs" UUID="BC48D3FD48D3B47C" LABEL="inst"
+/dev/sda5: UUID="5240AED140AEBB5D" LABEL="music" TYPE="ntfs"
+/dev/sdc1: UUID="81c4444f-0b70-429a-9d97-8c13e8651f5b" TYPE="ext3"
+/dev/sdc3: UUID="KOpHWz-clDR-2MqV-vAkE-cPvY-uZrY-kjYJIb" TYPE="lvm2pv"
+
+  $ udevinfo --query=all --name /dev/sdb    ## from 'udev' package
+P: /block/sdb
+N: sdb
+S: disk/by-id/ata-WDC_WD1600JS-00MHB0_WD-WCANM5835587
+S: disk/by-id/scsi-SATA_WDC_WD1600JS-00_WD-WCANM5835587
+S: disk/by-path/pci-0000:00:08.0-scsi-1:0:0:0
+E: ID_VENDOR=ATA
+E: ID_MODEL=WDC_WD1600JS-00M
+E: ID_REVISION=02.0
+...
+
+** How set UUID and label?
+
+For ext2/ext3 fs:
+
+  $ sudo tune2fs /dev/hdb1 -U `uuid`
+
 * Linux fs under Windows.
 
 ** Ext2 IFS.