commandline session
following session display may not be accurate
$sudo head dmesg [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.2.0-4-amd64 (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.46-1+deb7u1 [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=UUID=3219e911-81fb-4d52-ba7c-117a58d09312 ro quiet [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009e800 (usable) [ 0.000000] BIOS-e820: 000000000009e800 - 00000000000a0000 (reserved) [ 0.000000] BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved) [ 0.000000] BIOS-e820: 0000000000100000 - 000000009e5e7000 (usable) [ 0.000000] BIOS-e820: 000000009e5e7000 - 000000009e619000 (reserved) $sudo head ls head: cannot open `ls' for reading: No such file or directory $sudo head -6 dmesg [ 0.000000] Initializing cgroup subsys cpuset [ 0.000000] Initializing cgroup subsys cpu [ 0.000000] Linux version 3.2.0-4-amd64 (debian-kernel@lists.debian.org) (gcc version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.2.46-1+deb7u1 [ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-3.2.0-4-amd64 root=UUID=3219e911-81fb-4d52-ba7c-117a58d09312 ro quiet [ 0.000000] BIOS-provided physical RAM map: [ 0.000000] BIOS-e820: 0000000000000000 - 000000000009e800 (usable) $sudo head -3 auth.log daemon.log ==> auth.log daemon.log <== Nov 10 20:11:07 debian acpid: starting up with netlink and the input layer Nov 10 20:11:07 debian acpid: 1 rule loaded Nov 10 20:11:07 debian acpid: waiting for events: event logging is off $tail -f iostat tail: cannot open `iostat' for reading: No such file or directory $tail -f dmesg tail: cannot open `dmesg' for reading: Permission denied $sudo tail -f dmesg [ 14.815581] NET: Registered protocol family 31 [ 14.815587] Bluetooth: HCI device and connection manager initialized [ 14.815593] Bluetooth: HCI socket layer initialized [ 14.815603] Bluetooth: L2CAP socket layer initialized [ 14.815824] Bluetooth: SCO socket layer initialized [ 14.847521] Bluetooth: RFCOMM TTY layer initialized [ 14.847531] Bluetooth: RFCOMM socket layer initialized [ 14.847535] Bluetooth: RFCOMM ver 1.11 [ 14.924529] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 14.924536] Bluetooth: BNEP filters: protocol multicast ^C$
a typical video tutorial related
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