atomic ops in c with help of gcc 
atomic.h Read More...

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find PCs in a network 
for i in $(seq 2 254); do ping -c 1 192.168.0.$i | grep -q rtt && echo "found 192.168.0.$i"; done

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kvm pxe boot 
get a ISO bootable image without legacy floppy emulation (.iso) from etherboot

kvm.sh:
#!/bin/sh

switch=br0

USERID=$(whoami)
iface=$(sudo tunctl -b -u $USERID)

sudo /usr/sbin/brctl addbr $switch
sudo /sbin/ifconfig $switch 192.168.99.1 up

kvm -M pc -m 512 -smp 1 -cdrom eb-5.4.3-ns8390.iso \
-boot d -net nic,model=rtl8139 \
-net tap,vlan=0,ifname=$iface, \
script=qemu-ifup,downscript=qemu-ifdown

sudo tunctl -d $iface &> /dev/null

sudo /sbin/ifconfig br0 down
sudo /usr/sbin/brctl delbr $switch
qemu-ifup:
#!/bin/sh

#!/bin/sh

switch=br0

if [ -n "$1" ];then
echo "config $1"
/usr/bin/sudo /sbin/ifconfig $1 0.0.0.0 promisc up
/usr/bin/sudo /usr/sbin/brctl addif $switch $1
exit 0
else
echo "Error: no interface specified"
exit 1
fi
qemu-ifdown:
#!/bin/sh

switch=br0

if [ -n "$1" ];then
sudo tunctl -d $1
sudo ifconfig $switch down
exit 0
else
echo "Error: no interface specified"
exit 1
fi


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apparmor create a new profile 
aa-genprof can not connect to internet, therefore i do it manually

/etc/apparmor.d/usr.bin.program:
#include <tunables/global>
/usr/sbin/program flags=(complain) {
#include <abstractions/base>
}

start program and use it

aa-logprof -f /var/log/syslog -m "STARTSCAN-TIMESTAMP FROM SYSLOG"

Answer the questions and save it.

if no audit logs occur remove "flags=(complain)"

reload a rule: apparmor_parser -r usr.bin.program

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format a partition with check for badblocks 
badblocks -swvo <output_file> /dev/PARTITION
mkfs.vfat -l <output_file> /dev/PARTITION


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