commandline session

$ 4.2.36 8 508---> reportbug --debug
Please enter the name of the package in which you have found a problem, or type 'other' to report a more
general problem.
> testing
*** Welcome to reportbug.  Use ? for help at prompts. ***
Note: bug reports are publicly archived (including the email address of the submitter).
Detected character set: UTF-8
Please change your locale if this is incorrect.

Using 'Jeffrin Jose Thalakkottoor ' as your from address.
Getting status for testing...
No matching source or binary packages.
A package named "testing" does not appear to be installed; do you want to search for a similar-looking filename
in an installed package [Y|n|q|?]? n
Getting available info for testing...
Please enter the version of the package this report applies to (blank OK)
> 1.1
Will send report to Debian (per lsb_release).
Querying Debian BTS for reports on testing (source)...
No bug reports found.

Briefly describe the problem (max. 100 characters allowed). This will be the bug email subject, so keep the
summary as concise as possible, for example: "fails to send email" or "does not start with -q option specified"
(enter Ctrl+c to exit reportbug without reporting a bug).
> testing
How would you rate the severity of this problem or report?

1 critical        makes unrelated software on the system (or the whole system) break, or causes serious data
                  loss, or introduces a security hole on systems where you install the package.
2 grave           makes the package in question unusable by most or all users, or causes data loss, or
                  introduces a security hole allowing access to the accounts of users who use the package.
3 serious         is a severe violation of Debian policy (that is, the problem is a violation of a 'must' or
                  'required' directive); may or may not affect the usability of the package. Note that non-
                  severe policy violations may be 'normal,' 'minor,' or 'wishlist' bugs. (Package maintainers
                  may also designate other bugs as 'serious' and thus release-critical; however, end users
                  should not do so.). For the canonical list of issues worthing a serious severity you can
                  refer to this webpage: http://release.debian.org/wheezy/rc_policy.txt .
4 important       a bug which has a major effect on the usability of a package, without rendering it completely
                  unusable to everyone.
5 does-not-build  a bug that stops the package from being built from source. (This is a 'virtual severity'.)
6 normal          a bug that does not undermine the usability of the whole package; for example, a problem with
                  a particular option or menu item.
7 minor           things like spelling mistakes and other minor cosmetic errors that do not affect the core
                  functionality of the package.
8 wishlist        suggestions and requests for new features.

Please select a severity level: [normal] 7
Do any of the following apply to this report?

1 d-i       This bug is relevant to the development of debian-installer.
2 ipv6      This bug affects support for Internet Protocol version 6.
3 l10n      This bug reports a localization/internationalization issue.
4 lfs       This bug affects support for large files (over 2 gigabytes).
5 patch     You are including a patch to fix this problem.
6 upstream  This bug applies to the upstream part of the package.
7 none

Please select tags: (one at a time) [none]
Spawning sensible-editor...
No changes were made in the editor.
Report will be sent to Jeffrin Jose Thalakkottoor 
Submit this report on testing (e to edit) [y|n|a|c|E|i|l|m|p|q|d|t|s|?]? y
Report is unchanged. Edit this report or quit [E|q|s|?]? s
Sending empty report anyway...
Connecting to smtp.mail.yahoo.com:4100 via SMTP...
SMTP send failure: Connection unexpectedly closed: [Errno 104] Connection reset by peer. Do you want to retry
(or else save the report and exit)? [Y|n|q|?]?

Linux(kernel) System Administration

commandline session

$ 4.2.36 5 505---> bash --noediting
$ 4.2.36 1 501---> tcp
bash: tcp: command not found
$ 4.2.36 2 502--->
$ 4.2.36 2 502---> exit
exit
$ 4.2.36 6 506---> tcprobe

$ 4.2.36 16 516---> bash -v
# System-wide .bashrc file for interactive bash(1) shells.

# To enable the settings / commands in this file for login shells as well,
# this file has to be sourced in /etc/profile.

# If not running interactively, don't do anything
[ -z "$PS1" ] && return

# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize

# set variable identifying the chroot you work in (used in the prompt below)
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then
    debian_chroot=$(cat /etc/debian_chroot)
fi

# set a fancy prompt (non-color, overwrite the one in /etc/profile)
PS1='${debian_chroot:+($debian_chroot)}u@h:w$ '

# Commented out, don't overwrite xterm -T "title" -n "icontitle" by default.
# If this is an xterm set the title to user@host:dir
#case "$TERM" in
#xterm*|rxvt*)
#    PROMPT_COMMAND='echo -ne " 33]0;${USER}@${HOSTNAME}: ${PWD} 07"'
#    ;;
#*)
#    ;;
#esac

# enable bash completion in interactive shells
#if ! shopt -oq posix; then
#  if [ -f /usr/share/bash-completion/bash_completion ]; then
#    . /usr/share/bash-completion/bash_completion
#  elif [ -f /etc/bash_completion ]; then
#    . /etc/bash_completion
#  fi
#fi

# if the command-not-found package is installed, use it
if [ -x /usr/lib/command-not-found -o -x /usr/share/command-not-found/command-not-found ]; then
	function command_not_found_handle {
	        # check because c-n-f could've been removed in the meantime
                if [ -x /usr/lib/command-not-found ]; then
		   /usr/bin/python /usr/lib/command-not-found -- "$1"
                   return $?
                elif [ -x /usr/share/command-not-found/command-not-found ]; then
		   /usr/bin/python /usr/share/command-not-found/command-not-found -- "$1"
                   return $?
		else
		   printf "%s: command not foundn" "$1" >&2
		   return 127
		fi
	}
fi
#export PS1="[ 33[0;31m] $ V # ! "
export PS1="$ V # !---> "

shellp()
{
pre=: post=:
printf "$pre%s$postn" "$@"
}


procmailx ()
{
ORGMAIL=/var/mail/$LOGNAME

if cd $HOME &&
test -s $ORGMAIL &&
lockfile -r0 -l1024 .newmail.lock 2>/dev/null
then
trap "rm -f .newmail.lock" 1 2 3 13 15
umask 077
lockfile -l1024 -ml
cat $ORGMAIL >>.newmail &&
cat /dev/null >$ORGMAIL
lockfile -mu
formail -s procmail 

commandline session

$ 4.2.36 2 501---> echo $SHLVL
1
$ 4.2.36 3 502---> echo $SHLVL
1
$ 4.2.36 4 503---> bash
$ 4.2.36 1 500---> echo $SHLVL
2
$ 4.2.36 2 501---> logout
bash: logout: not login shell: use `exit'
$ 4.2.36 3 502---> exit
exit
$ 4.2.36 5 504---> echo $SHLVL
1
$ 4.2.36 6 505--->

commandline session

$ 4.2.36 2 501---> echo BASH_VERSINFO[0]
BASH_VERSINFO[0]
$ 4.2.36 3 502---> echo $BASH_VERSINFO[0]
4[0]
$ 4.2.36 4 503---> echo $BASH_VERSINFO
4
$ 4.2.36 5 504---> echo $BASH_VERSINFO[1]
4[1]
$ 4.2.36 6 505---> echo BASH_VERSINFO[1]
BASH_VERSINFO[1]
$ 4.2.36 7 506---> echo "BASH_VERSINFO[1]"
BASH_VERSINFO[1]
$ 4.2.36 8 507---> echo BASH_VERSINFO(1)
bash: syntax error near unexpected token `('
$ 4.2.36 8 508---> echo BASH_VERSINFO[4]
BASH_VERSINFO[4]
$ 4.2.36 9 509---> echo $BASH_VERSINFO[4]
4[4]
$ 4.2.36 10 510---> echo ?BASH_VERSINFO[4]
?BASH_VERSINFO[4]
$ 4.2.36 11 511---> echo !BASH_VERSINFO[4]
bash: !BASH_VERSINFO[4]: event not found
$ 4.2.36 11 511---> echo ?BASH_VERSINFO[4]
?BASH_VERSINFO[4]
$ 4.2.36 12 512--->

commandline session

$ 4.2.36 24 220---> sar -b 1 3
Linux 3.2.0-3-amd64 (debian) 	Saturday 29 September 2012 	_x86_64_	(1 CPU)

01:22:03  IST       tps      rtps      wtps   bread/s   bwrtn/s
01:22:04  IST      0.00      0.00      0.00      0.00      0.00
01:22:05  IST      0.00      0.00      0.00      0.00      0.00
01:22:06  IST      5.21      0.00      5.21      0.00   2541.67
Average:         1.71      0.00      1.71      0.00    832.76
$ 4.2.36 25 221--->
$ 4.2.36 25 221---> sar -b 2 3
Linux 3.2.0-3-amd64 (debian) 	Saturday 29 September 2012 	_x86_64_	(1 CPU)

01:28:41  IST       tps      rtps      wtps   bread/s   bwrtn/s
01:28:43  IST      2.55      0.00      2.55      0.00    600.00
01:28:45  IST      0.00      0.00      0.00      0.00      0.00
01:28:47  IST      0.00      0.00      0.00      0.00      0.00
Average:         0.85      0.00      0.85      0.00    199.66
$ 4.2.36 26 222--->

commandline session

root@debian:~# tcpdump -i wlan0
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 100535 bytes
23:33:46.824172 IP debian.local.48247 > mars.infoclub.in.http: Flags [S], seq 1276297543, win 14600, options [mss 1460,sackOK,TS val 4098743 ecr 0,nop,wscale 5], length 0
23:33:46.826612 IP debian.local.41745 > 192.168.0.1.domain: 43954+ PTR? 18.210.22.46.in-addr.arpa. (43)
23:33:46.827744 IP 192.168.0.1.domain > debian.local.41745: 43954 1/0/0 PTR mars.infoclub.in. (73)
23:33:46.828480 IP debian.local.35494 > 192.168.0.1.domain: 55325+ PTR? 101.0.168.192.in-addr.arpa. (44)
23:33:46.873207 IP 192.168.0.1.domain > debian.local.35494: 55325 NXDomain 0/0/0 (44)
23:33:46.975881 IP6 fe80::217:3fff:fed4:5a91.mdns > ff02::fb.mdns: 0 PTR (QM)? 101.0.168.192.in-addr.arpa. (44)
^C23:33:46.976095 IP debian.local.mdns > 224.0.0.251.mdns: 0 PTR (QM)? 101.0.168.192.in-addr.arpa. (44)

7 packets captured
54 packets received by filter
17 packets dropped by kernel
root@debian:~# tcpdump -i wlan0 not port 80
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on wlan0, link-type EN10MB (Ethernet), capture size 100535 bytes
23:34:05.296866 IP6 fe80::5ed9:98ff:fe5c:11a > ip6-allnodes: ICMP6, router advertisement, length 64
23:34:05.298404 IP debian.local.57548 > 192.168.0.1.domain: 1135+ PTR? a.1.1.0.c.5.e.f.f.f.8.9.9.d.e.5.0.0.0.0.0.0.0.0.0.0.0.0.0.8.e.f.ip6.arpa. (90)
23:34:05.301770 IP 192.168.0.1.domain > debian.local.57548: 1135 NXDomain 0/0/0 (90)
23:34:05.304101 IP debian.local.39053 > 192.168.0.1.domain: 17175+ PTR? 1.0.168.192.in-addr.arpa. (42)
23:34:05.543073 ARP, Request who-has debian.local tell 192.168.0.1, length 28
23:34:05.543107 ARP, Reply debian.local is-at 00:17:3f:d4:5a:91 (oui Unknown), length 28
^C23:34:08.676445 IP 192.168.0.1.2048 > 239.255.255.250.1900: UDP, length 280

7 packets captured
30 packets received by filter
0 packets dropped by kernel
root@debian:~#