Commands

From Halfface
Revision as of 14:06, 4 September 2012 by Ekaanbj (talk | contribs) (→‎shred)
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alternatives

alternatives --set mta /usr/sbin/sendmail.postfix

antiword

antiword bad.doc > pure.txt

arecord

List soundcards. 

arecord -l

Chose source. 

alsamixer

Create mp3 from source. 

arecord -f cd -d 5 -t raw | lame -x -r - out.mp3

boot

Booting singe user mode. 

kernel ... single

bootchart

Analyze startup times.

bootgraph

How to use. 

Kernel later than 2.6.28
kernel option initcall_debug
dmesg | /usr/src/linux-headers-2.6.28-11-generic/scripts/bootgraph.pl > /tmp/bootgraph.svg

cdrecord

Blank cd/dvd rw 

cdrecord -v gracetime=2 dev=/dev/cdrom -eject blank=all -force

chattr/lsattr

Set extendet attributes of files. 

Lock file for most activities.
chattr +i file
Unlock file
chattr -i file

chvt

From a script change to a virtual interface and connect script to that terminal. chvt 3 exec < /dev/tty3 > /dev/tty3

clean

Clean file from comments and blank lines. 

sed '/ *#/d; /^ *$/d'

codepage

Change codepage of file. 

convmv -f cp850 -t iso-8859-1 --notest *
convmv -f utf8 -t iso8859-1 -r --notest *
convmv -f iso8859-1 -t en_US.UTF-8 -r --notest .

convert

Convert Image to 8 bit grey with threshold for white. 

for tif in *.tif; do convert -depth 8 -white-threshold 70% ${tif} ${tif%%.*}.png;done

Resize image 

convert -resize 25% -gamma 1.5 2011-08-03_11-09-43.jpg 2011-08-03_11-09-43_new.jpg

Multipage pdf. 

convert -adjoin -page A4 -compress jpeg Infineon1.tif Infineon2.tif Infineon.pdf

Prepare photos for printing. 

convert -rotate 90 -gamma 1.5 -resize 25% -compress jpeg -quality 80 -adjoin -page A4 * print.pdf

cpio

Copy wanted partitions. 

#!/bin/bash
ssh root@192.168.2.148 "(cd /boot/ ; find ./ -xdev -depth -print0 | cpio -o -0Hnewc )" | (cd /mnt/sysimage/boot ; cpio -idvuma )
ssh root@192.168.2.148 "(cd / ; find ./ -xdev -depth -print0 | cpio -o -0Hnewc)" | (cd /mnt/sysimage ; cpio -idvuma )
# -o copy out mode.
# -0 terminated by null character.
# -Hnewc som storing format.
# -i extract copy in mode.
# -d make directories.
# -v verbose.
# -V print dot.
# -u replace all files.
# -m preserve modification time.
# -a preserve access time.

crontab

crontab. 

* * * * *  command to be executed
- - - - -
| | | | |
| | | | +----- day of week (0 - 6) (Sunday=0)
| | | +------- month (1 - 12)
| | +--------- day of month (1 - 31)
| +----------- hour (0 - 23)
+------------- min (0 - 59)
0 Sunday
1 Monday
2 Tuesday
3 Wednesday
4 Thursday
5 Friday
6 Saturday

Run command every 10 minutes. 

*/10 * * * * command

Start program under crontab. 

#!/bin/bash
COMMAND="screen -L -d -m ping www.dn.se"
if [ "$(ps -ef | grep -i ping | grep -v grep)" ]
then
  echo "\"${COMMAND}\" already running."
else
  echo "Starting \"${COMMAND}\"."
  cd /tmp
  ${COMMAND}
fi

cut

Cuf everything from field 5. 

cut -f5- -d ' '

curl

Get http return code. 

curl --connect-timeout 3 --max-time 9 -ksL -w '%{http_code}\n' 'http://www.dn.se' -o /dev/null
curl ifconfig.me # get external ip.
curl ifconfig.me/all # get external ip and all related browser information.

date

date '+%Y-%m-%d %H:%M'
date +%Y-%m-%d-%H%M

# date 033121422003.55
Mon Mar 31 21:42:55 PST 2003
date MMDDhhmmCCYY.ss

# 
date --date="+1000 years" +%C%y-%m-%d
date --date="-2 hour" +%C%y-%m-%d\ %H:%M
TZ=CEST date --date="-2 hour" +%C%y-%m-%d\ %H:%M

#
TZ=GMT date -d '@1345064585'
Wed Aug 15 21:03:05 GMT 2012

dbus-monitor

dbus-monitor   # Monitor activity on the dbus to see what system and sessions are doing.

dd

output your microphone to a remote computer's speaker 

dd if=/dev/dsp | ssh -c arcfour -C username@host dd of=/dev/dsp

dhclient

[root@wall sysconfig]# cat /etc/dhclient.conf 

interface "eth0" {
         prepend domain-name-servers 127.0.0.1;
         supersede domain-name "bltprojektering.se";
}

diff

sdiff <(echo -e 'hej\nda\nvi\nses\ni\nmorgon') <(echo -e 'hej\ndå\nvi\nSES\ni\nmorgon')

which files differ between servers. 

rsync -nrlptDqv --delete --exclude napsjb/server/naps/tmp/ /opt/ongame/ 10.6.21.11:/opt/ongame | less
-n dry run.
-r recursive
-l copy symlinks av symlinks.
-p preserve permission
-t preserve tims.
-D --device --special. Keep special files.
-q quiet
-v verbose

dig

dig any www.halfface.se
dig halfface.se ANY +noall +answer

digitemp

digitemp_DS9097 -c /etc/.digitemprc -t0

disk

disk usage 

baobab

foremost 

recover deleted files.

display

Change resolution 

xrandr --output LVDS --mode 1280x800
xrandr --output default --mode 1280x1024

Query graphics card capabilities. 

xrandr -q

Change dpi 

xrandr --dpi 138/eDP1

dvgrab

Capture dv material 

dvgrab -f dv2 -i -showstatus -s 0 -timestamp California-2

e2fsck

Scan for bad blocks. 

e2fsck -ycv /dev/VolGroup00/LogVol00

edid/ddc

startx -- -logverbose 5.
The EDID information turns up in /var/log/Xorg.0.log.

encryption

Simple encryption decryption with gnupg. 

gpg -c --force-mdc /temp/shadow
echo "$(gpg -qd /temp/shadow.gpg)"

exiftool

Change meta data for files, exif, jpg, mp3...

fdupes

Find duplicate files. 

fdupes -r /home

ffmpeg

ffmpeg 

ffmpeg -y -deinterlace -aspect 16:9 -author "Andreas Bjorklund" -title "Tanzania" -year 2007 -i Tanzania.m2t -acodec mp3 -vcodec mpeg4 -b 3000k -s 720x540 test.avi

Create swf/flv from mpeg2 stream 

ffmpeg -deinterlace -i VTS_01_1.VOB -ab 56 -ar 22050 -b 500000 -r 15 -s 360x288  sisyfos.swf

Create horse movie. 

ffmpeg -deinterlace -i /temp/VTS_01_1.VOB -ab 100 -ar 22050 -b 1200000 -r 25 -s 360x288 3horses.swf

Cut video from command prompt. 

ffmpeg -i video.avi -vcodec copy -acodec copy -ss 00:00:00 -t 00:00:04 trimmed_video.avi

Record desktop. 

ffmpeg -f x11grab -s $(xrandr | grep \*+|awk '{print $1}') -r 25 -i :0.0 -sameq /tmp/out.mpg

Change container. 

 ffmpeg -i film.mov -vcodec copy -acodec copy film.mp4

find

Find exluding directory. 

find . -wholename '/var/' -prune -o -ls

Find in only files. 

find /opt/ongame/ -type f -exec grep --color=always -r '10\.7\.' /dev/null {} \;

Find text file in directoy execpt directory. Grep for text in that file and show it with colours in less. 

find /opt/ongame/ -wholename '/opt/ongame/napsjb/server/naps/tmp' -prune -o -type f -exec grep --color=always -r '/fraud' /dev/null {} \; | less -SR

Find excluding svn. 

find . -path '*/.svn' -prune -o -type f -print

Searches for files modified up to 4 days ago. 

find ./ -type f -mtime -4

Searches for files modified between certain dates. Here for files older than 30 days but younger than 60 (penultimate month). 

find ./ -type f -mtime -60 ! -mtime -30

forward traffic

service x11
{
        disable = no
        socket_type = stream
        protocol = tcp
        wait = no
        user = root
        server = /usr/bin/nc
        server_args = 172.28.37.152 6000
}

gphoto2

Capture photo from the command line linux. 

gphoto2 --camera='Canon EOS 40D (PTP mode)' --port=usb: --capture-image-and-download

grep

Colorize grep output. 

grep --color=always -r '10\.7\.' /opt/ongame/

Show non comment lines ending with a blank. 

find . -name '*.properties' -exec grep --color=always -E '^[^#].*\ $' {} \; | less -SR

grep ipaddress from message file. 

sudo grep DHCP /var/log/messages | grep -oir --color=always '192\.168\.[0-9]*\.[0-9]*' | sort -u
grep -E '([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))\.([0-9]|[1-9][0-9]|1([0-9][0-9])|2([0-4][0-9]|5[0-5]))'

grep ipaddress from file 

grep -E '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'

Scan and ocr pdf dokuments

gscan2pdf

Handbrake

Compress dvd

  1. Rip dvd.
sudo vobcopy -o /storage/temp/ -v -x -l
  1. compress video.
HandBrakeCLI -e x264 -Z Normal -i source.vob -o destination.mkv -a 2 -r 25 -E faac -f mkv -d -S 600 --crop 0:0:0:0
  1. Create film for android.
HandBrakeCLI -i 01.Alla.Vi.Barn.I.Bullerbyn.1986.SWEDiSH.vob -o 01.Alla.Vi.Barn.I.Bullerbyn.1986.SWEDiSH.mp4 -x level=30:bframes=0:cabac=0:ref=1:vbv-maxrate=1500:vbv-bufsize=2000:analyse=all:me=umh:no-fast-pskip=1 -e x264 --vb 300 -E faac --ab 128 --maxWidth 320 -2 -T -d
  1. Compress.
SOURCE=/ssd/temp ; DESTINATION=/temp ; for FILM in $(cd ${SOURCE}; ls *.mov | sed 's/\.mov$//g'); do HandBrakeCLI -e x264 -q 20 -B 160 -i ${SOURCE}/${FILM}.mov -o ${DESTINATION}/${FILM}.mp4 ;done

htmldoc

Convert html document to pdf 

htmldoc --webpage -f php_html_doc.pdf /home/andreasbj/php_manual_en.html 2>/tmp/htmldoc

hunspell

hunspell -d sv_SE swedish.txt

ifconfig

Configure network. 

ifconfig eth0 192.168.0.1 netmask 255.255.255.0 up

ip address alias 

ifconfig eth0:0 192.168.1.2

Network configuration Full config. 

echo -e "domain halfface.se
nameserver 84.246.88.10
nameserver 84.246.88.20" > /etc/resolv.conf
ifconfig eth0 89.253.75.84 netmask 255.255.255.224 up
route add default gw 89.253.75.65 eth0

ilo

log in to ilo 

env -u LANG ssh -v Ongame@10.1.1.94

restart ilo 

reset map1

start system 

start system1

ip

show routing 

ip r l

which outgoing interfaces are available. 

ip r l| awk '/src/{print $9}'

Which route is used for ip. 

ip route get 192.168.122.252

iptables

Show iptables OUTPUT, PREROUTING and POSTROUTING 

iptables --table nat --list --exact --verbose --numeric --line-number

irc

Close private messages 

/window close

Close public messages 

/window close

Close a query 

/q

jpegtran

# to lossless cut a file.
jpegtran -crop 700x400+2150+1500 2012-05-19_20-39-35.jpg > /photos/Sweden/2012/2012-05-19/2012-05-19_20-39-35.jpg
# Rotate counter clockwise.
jpegtran  -copy all -rotate 270 2012-08-18_15-06-43.jpg > 2012-08-18_15-06-43_270.jpg

keyboard

keymaps 
dumpkeys
loadkeys sv-latin1
loadkeys us
setxkbmap en

reset corrupt keyboard after using vmware. 

setxkbmap

kill

suspend/resume a jobb. 

# kill -STOP PID
# kill -CONT PID

lastb

Show failed ssh logins. 

lastb

locale

To show 24 hour format. 

LC_ALL=C

lock

locking keyboard under linux. 

lock-keyboard-for-baby

logging

bash create log. 

#!/bin/bash
exec > /logfile

alternative 

exec 2>/tmp/log

Read logs on system. 

tail -f $(lsof | grep log$ |awk '{ print $NF }' | sort -u |xargs)

lshw

Is cpu 32 or 64bit. 

lshw -class processor

mail

command line mail with changed from 

echo -en "\nAndreas is playing\nwith mail\nPlease take care." | /bin/mail -s "Subject written by Andreas" "andreas.bjorklund@company.org" -- -f "andreas.bjorklund@company.org"
echo "#MESSAGES# This is the message. #MESSAGE#" | mailx -s "#SUBJECT# This is the subject. #SUBJECT#" 0XXXXXXX@sms.tele2.se -- -r anden@halfface.se

man

man correct caracters. 

LANG=C man passwd

man clean for output to file. 

man [manual] | col -b > file.txt

mbr

backup mbr. 

# dd if=/dev/sdX of=/temp/sdx-mbr bs=512 count=1

restore mbr 

# dd if=/temp/sdx-mbr of=/dev/sdX bs=446 count=1

mkfs

Create fat32 file system. 

mkfs.vfat -F 32 /dev/sdc1

mogrify

Resize, crop... a file. Removes original. 

mogrify -resize 800 *.jpg

mount

Mount a temporary ram partit 

mount -t tmpfs tmpfs /mnt -o size=1024

mplayer

mplayer in ascii mode. 

mplayer -monitoraspect 4:3 -vo aa LinaFreestyler.avi

mplayer on second soundcard. 

mplayer -ao oss:/dev/dsp *.mp3
mplayer -ao alsa:device=hw=0.0 *.mp3

Or, to specify a non-default (secondary) device either of the following commands can be used. 

mplayer -ao oss:/dev/dsp1 *.mp3
mplayer -ao alsa:device=hw=1.0 *.mp3

play from v4l 

mplayer -tv device=/dev/video:driver=v4l:input=1:width=640:height=480:norm=ntsc:adevice=/dev/dsp tv://1 -zoom -aspect 4:3
mplayer -fps 15 tv:// -tv driver=v4l2:width=640:height=480:device=/dev/video0play hdv material.
mplayer -monitoraspect 16:9 -vf pp=lb

play dvd image. 

mplayer dvd://1 -dvd-device DVD.iso

MP4Box

Combine mp4 files 

MP4Box -add file1.mp4 -add file2.mp4 output.mp4

mtr

ping and traceroute combined. 

mtr -rc 10 www.googe.com

mutt

Put the followin in .muttrc to change From. 

set realname="Joe User"
set from="user@host"
set use_from=yes

command line mail with attachment 

mutt -s subject -a syslogs.tar.gz admin@domain.org < /dev/null

Change sender from command line. 

echo "Test add sender in mutt from command line" | mutt -s "test mail" -e "set realname=\"Andreas Bjorklund\"" -e "set from=\"anden@halfface.se\"" -e "set use_from=yes" anden@halfface.se

netcat

  • Check communication.

listen on port 3333. 

nc -l 3333

talk to port 3333. 

nc 192.168.0.1 3333
  • Transfer data.

Cat file, calculate size listen on port 3333. 

cat backup.iso | pv -b | nc -l 3333

Receive file. 

nc 192.168.0.1 3333 | pv -b > backup.iso
  • Setup telnet server
nc -L -l -p1234 -d -e cmd.exe
  • Test connection.
nc -w2 -znv 10.1.22.31 7222
  • tunnel

On the server, we open a listener on the TCP port 6667 which will forward data to UDP port 53 of a specified IP. If you want to do DNS forwarding like me, you can take the first nameserver's IP you will find in /etc/resolv.conf - in this example, this is 192.168.1.1. But first, we need to create a fifo. The fifo is necessary to have two-way communication between the two channels. A simple shell pipe would only communicate left process' standard output to right process' standard input. 

mkfifo /tmp/fifo
nc -l -p 6667 < /tmp/fifo | nc -u 192.168.1.1 53 > /tmp/fifo

nmap

Scan for open ssh ports. 

nmap -p 22 --open -sV 10.0.0.0

nohup

Start binary under nohup and tail log. 

nohup ./run.sh & sleep 1 ; tail -1000f nohup.out

ntfs-3g

mount ntfs filesystem. read and write. 

yum install fuse fuse-libs ntfs-3g
mount /dev/sda1 /media/c_drive -t ntfs-3g -r -o umask=0222,locale=en_US
mount /dev/sda1 /media/c_drive -t ntfs-3g -rw -o umask=0000,locale=en_US
fstab read and write.
/dev/sda3   /media/e_drive     ntfs-3g    ro,defaults,umask=0222 0 0
/dev/sda1   /media/c_drive     ntfs-3g    rw,defaults,umask=0000 0 0

numbers

series of numbers 

bash:
echo {1..10}

password cracking

hydra -l root -P /etc/passwdknown -t 5 192.168.29.62 ssh2

patch

Update release area Windows. 

servicepack.exe -s:z:\w2k3

pidof

which pids has a program stared. Find pid.

pgrep

Grep any processlines including 1066 

pgrep -lf 1066

postfix

remove mails in queue. 

mailq 2>&1 | grep ^[A-F0-9] | awk '{print $1}' | postsuper -d -

printscreen

import -window root test.png

/proc

  • /proc/meminfo

MemTotal — Total amount of physical RAM, in kilobytes.

MemFree — The amount of physical RAM, in kilobytes, left unused by the system.

Buffers — The amount of physical RAM, in kilobytes, used for file buffers.

Cached — The amount of physical RAM, in kilobytes, used as cache memory.

SwapCached — The amount of swap, in kilobytes, used as cache memory.

Active — The total amount of buffer or page cache memory, in kilobytes, that is in active use. This is memory that has been recently used and is usually not reclaimed for other purposes.

Inactive — The total amount of buffer or page cache memory, in kilobytes, that are free and available. This is memory that has not been recently used and can be reclaimed for other purposes.

HighTotal and HighFree — The total and free amount of memory, in kilobytes, that is not directly mapped into kernel space. The HighTotal value can vary based on the type of kernel used.

LowTotal and LowFree — The total and free amount of memory, in kilobytes, that is directly mapped into kernel space. The LowTotal value can vary based on the type of kernel used.

SwapTotal — The total amount of swap available, in kilobytes.

SwapFree — The total amount of swap free, in kilobytes.

Dirty — The total amount of memory, in kilobytes, waiting to be written back to the disk.

Writeback — The total amount of memory, in kilobytes, actively being written back to the disk.

Mapped — The total amount of memory, in kilobytes, which have been used to map devices, files, or libraries using the mmap command.

Slab — The total amount of memory, in kilobytes, used by the kernel to cache data structures for its own use.

Committed_AS — The total amount of memory, in kilobytes, estimated to complete the workload. This value represents the worst case scenario value, and also includes swap memory.

PageTables — The total amount of memory, in kilobytes, dedicated to the lowest page table level.

VMallocTotal — The total amount of memory, in kilobytes, of total allocated virtual address space.

VMallocUsed — The total amount of memory, in kilobytes, of used virtual address space.

VMallocChunk — The largest contiguous block of memory, in kilobytes, of available virtual address space.

HugePages_Total — The total number of hugepages for the system. The number is derived by dividing Hugepagesize by the megabytes set aside for hugepages specified in /proc/sys/vm/hugetlb_pool. This statistic only appears on the x86, Itanium, and AMD64 architectures.

HugePages_Free — The total number of hugepages available for the system. This statistic only appears on the x86, Itanium, and AMD64 architectures.

Hugepagesize — The size for each hugepages unit in kilobytes. By default, the value is 4096 KB on uniprocessor kernels for 32 bit architectures. For SMP, hugemem kernels, and AMD64, the default is 2048 KB. For Itanium architectures, the default is 262144 KB. This statistic only appears on the x86, Itanium, and AMD64 architectures.

ps

Process list in tree view. 

ps axfww

Process list sorted after memory usage. 

ps aux --sort=size

pulse audio

sudo /sbin/alsactl restore

putty

set up tunnel 

putty -l bjorklun -pw password -L 19242:192.168.0.42:3389 blt.homeip.net

pv

throughput in pipe. speed. 

pv
pv -cN

readpst

output pst file in separate files in out directory 

readpst -S -o out/ outlook.pst

rename

Recursive lowercase to uppercase 

for i in $(find * -depth); do (mv $i $(echo $i | sed 's%[^/][^/]*$%%')$(echo $i | sed 's!.*/!!' | tr [:upper:] [:lower:])); done

reboot

Hard reboot mean that shutdown scripts will not run and machine reboot immediately without syncing hard disk drives, shutdown applications etc.
echo 1 > /proc/sys/kernel/sysrq
echo b > /proc/sysrq-trigger
This commands enable sysrq and after this call fast reboot. If you want to force shutdown machine try this.

Force shutdown 

echo 1 > /proc/sys/kernel/sysrq 
echo o > /proc/sysrq-trigger

rfcomm

list usb devices 

hcitool scan

What properties does the device have. 

sdptool browse 00:0D:B5:30:07:79

connect bluetooth device virtual servial. 

rfcomm bind /dev/rfcomm0 00:0D:B5:30:07:79 1

route

The route to a network is behind 10.111.222.7 

route add -net 10.111.223.0 netmask 255.255.255.0 gw 10.111.222.7

rpm

install src.rpm 

rpmbuild --rebuild alien-6.51-1.src.rpm
rpm -i /usr/src/redhat/RPMS/x86_64/alien-6.51-1.rpm

List contents of rpm. 

rpm -qlp myfile.rpm

Extract contents of rpm. 

rpm2cpio *.rpm | cpio -i --make-directories

Which version of rpm is installed. /etc/rpm/macros ~/.rpmmacros 

%_query_all_fmt         %%{name}-%%{version}-%%{release}.%%{arch}

list architecture
rpm -qa --qf "%{n}-%{v}-%{r}.%{arch}\n"

List only name of installed rpms. 

rpm -qa --qf "%{NAME}\n"

Extract rpms in subdirectories. 

for RPM in $(ls *|sed 's_\.rpm$__g');do echo $RPM; mkdir $RPM; rpm2cpio $RPM.rpm | (cd $RPM && cpio -i --make-directories);done

rsync

Syncronize folders. Delete non existing files on remote host. Compress. 

rsync --delete -az -e ssh bjorklun@semco.homeip.net:/install/program/windows/

Syncronize files over ssh on port 2222. Show progress. Syncronize even empty directories. 

rsync -Pae 'ssh -p 2222' localhost:/opt/techops/bin/ /opt/techops/bin/

Run rsync in both ends but transfer data with normal user. 

sudo rsync -aP /tmp/andreas/ andreasbj@localhost:/tmp/andreas2/ --rsync-path='sudo rsync'

rsync with limit of 8 MB/s. 

rsync -aP --bwlimit=8000 /source/ /destination/

rsync excluding directory 

rsync -r --exclude=.svn /source/ /destination/

rsync including selinux information. 

rsync -aPX /source /destination

sar

Old sar information. 

sar -f /var/log/sa/sa25 -s 00:00:00 -e 23:59:00

load average. 

sar -q -f /var/log/sa/sa25 -s 00:00:00 -e 23:59:00

All information. 

sar -A -f /var/log/sa/sa25 -s 00:00:00 -e 23:59:00

View network statistics. 

LANG=c sar -n DEV | grep eth0

realtime summary. 

sar 4 5

screen

Start program in screen. 

screen -d -m

CTRL + a + 

S split
? help
tab move between windowss
Q only this windows
" show list
esc histor/copy mode
] paste
A name window
? / search in history mode.

search&replace

perl 

grep -rsl '10.6.4.102' * | xargs perl -pi -e 's/10.6.4.102/10.6.4.103/'

sed 

find . -type f -exec sed -i 's/string1/string2/g' {} \;

Grep for regexp starting with CN= and stop at first occurrence of ,. not greedy 

grep -oE 'CN=[^,]*,'

shred

Recurse remove dir 

find /tmp/secret -type f -exec shred {} \;

shuf

Pick random line in file. 

shuf -n1 /file

sms

Mail to sms gateway. 

tele2
07XXXXXXXX@sms.tele2.se

Comviq
467xxxxxxxx@sms.comviq.se

Europolitan
4670xxxxxxx@europolitan.se

snmpwalk

Get information from an oid. 

snmpwalk -v 1 -c public localhost .1.3.6.1.4.1.2021.84

sort

Sort ip address. 

sort -t. +0n -1 +1n -2 +2n -3 +3n -4 <ip.list > ip.list.sort

sort on fift column 

sort -t, -k5n,5 /tmp/gfp

spawn

Encode wav to ogg in parallel. 

 # ls -1 *.wav | while read ; do echo "oggenc -q6 \"$REPLY\"" ; done | spawn -j4

ssh

Automated login on a user basis via ssh. 

ssh-keygen -t dsa                    Generate personal ssh keys.
cat id_dsa.pub >> authorized_keys   Copy your personal ssh key to all machines.
chmod 644 ~/.ssh/authorized_keys    Verify correct access on files.
ssh andreasbj@www.halfface.se "cat >> ~/.ssh/authorized_keys" <  /home/andreasbj/.ssh/id_dsa.pub

Copy public key to authorized_keys 

ssh-copy-id user@host

Tunnel 

sudo ssh -nNTx -R 2222:localhost:22 andreasbj@www.halfface.se
-n	Dont take console. Good for background.
-N	Do not execute a remote command
-T	Disable pseudo-tty allocation.
-x	Disables X11 forwarding.
-R port:host:hostport
sudo ssh -N -L 2222:www.halfface.se:22 www.halfface.se
sudo ssh -nNTx -R 2222:www.halfface.se:22 www.halfface.se
sudo ssh -nNTx -R 443:satellite.ongame.com:443 root@10.0.254.30 # Tunnel 443 over ssh from remote host via local host.

Limit ssh access with pam_access 

/etc/security/access.conf

mount filesystem over ssh 

sshfs name@server:/path/to/folder /path/to/mount/point


Talk

Talks swedish. 

espeak -v swedish -f /tmp/file

tar

Make a backup of a directory or disk. 

server: tar -cpsf - $dir | pv -b | nc -l 3333
client: nc server 3333 | pv -b | tar -xpst -

tcpdump

dump trafic information, -e Print the link-level header on each dump line, -vvv verbose. 

tcpdump -e -vvv port 21

dump all trafic to and from machine. -w write to file, -s0 size of package, host to listen from. 

time tcpdump -w ssl_dump -s0 host test.x30.webservices.itsfogo.com

dump all trafic into files of max 100MB. 270MB in reality. 

sudo tcpdump -w snoop -s0 -C 100000000

dump all trafic. compress logfiles. Create 10 files which are 10 MB big. Dont convert numbers to names. Dont truncate frames create logfile with this name. 

sudo tcpdump -z gzip -i wlan0 -C 10 -W 10 -n -s0 -w /tmp/tcpdump.log

Which machines send a syn packet. 

sudo tcpdump -nn -i eth0 'tcp[13] = 2'

top derivates

apachetop
dnstop
iftop
latencytop

tibco

show permissions. 

help permissions

Create user 

create user surveillance "Surveillance user" password=surveillance

Grant user permission to view all 

grant admin user=surveillance view-all

timeout

limit waiting for a period. 

timeout 2s sleep 100

touch

touch -am 0910120003    Give a new access time on a file 0910120003MMDDhhmmyy

linux 

touch -t 197102162324 *

tr

translate capital to lower letter. 

tr '[:upper:]' '[:lower:]'

trickle

Speed limit for download 

rsync -ae "trickle -d 80 ssh" user@host:/src/ /dst/

Speed limit for upload. 

rsync -ae "trickle -u 80 ssh" user@host:/src/ /dst/

tune2fs

tune2fs -m 0 /dev/sdb1

udevadm

Monitor udev events. 

udevadm monitor

unetbootin

Boot iso image from usb memory.

vi

:set ignorecase
:set list        show all keys.
:set nolist      show their representative.

vmstat

top over time. 

vmstat -n 5

Description: 

r=procs waiting for cpu time.
b=procs in sleep mode.
swpd=virtual memory in use in swap.
free=memory free.
buff=memory used by buffers
cache=memory used as cache.
si=swap in.
so=swap out.
bi=io block in.
bo=io block out.
in=interups
cs=contex switching.
us=cpu user space
sy=cpu system usage to serve.
id=cpu idle
wa=cpu waiting for input output. iowait.
st=cpu time stolen from a virtual machine

procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 2  1 814984 167992  26820 999460    0    0     1     0 2467 5088  2  2 95  1  0   
 0  0 814984 168100  26820 999540    0    0     2   150 2467 5026  1  2 97  0  0

wget

wget -r -nH -np --cut-dirs=1 --no-check-certificate -U Mozilla --user={uname} --password={pwd} https://my-host/my-webdav-dir/my-dir-in-webdav

wodim

Burning disks. 

wodim -scanbus    # Scan scsi bus for burners.
wodim --devices   # Discover basic information.
wodim -checkdrive # Information about burner.
wodim -tao speed=0 dev=/dev/sr0 -v -data /temp/files/                      # Burn disk containing structure from /temp/files/
wodim -eject  -tao speed=0 dev=/dev/scd0 -v -data /my/directory/image.iso   # Burn image to disc.

xargs

locate case insensetive, regular expression. xargs string to replace imput. Print output to standard error. 

locate -ir ".*\.crt$" | xargs -I '{}' -t cp {} /temp/ssl/

Do something on everything from standard input. 

ls -la | xargs -i% echo '# beginning #' % '# end of line #'

zip

Zip directory exclude files .svn directory. 

zip -r /temp/ssl.zip . -x ".svn/*"

zdump

View information from timezone tz. 

zdump -v /etc/localtime
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