cd /proc
ls
cat meminfo 
free
free -h\
free -h
free -g
free -m
cat cpuinfo 
cat interrupts 
cat partitions 
cat filesystems 
ls
cat misc 
cat timer_list 
 
sudo su
cd
dd if=/dev/zero of=/tmp/dummy
exit
dd if=/dev/zero of=/tmp/dummy
ls -l /tmp/dummy
dd if=/dev of=/dev/null
/////////////////////////////////////////////////////////
top
df
mount
cat /etc/mtab 
cat /etc/fstab 

---- from root's .bash_history ----

fdisk /dev/sda1
tune2fs /dev/sda1
dumpe2fs /dev/sda1
dumpe2fs /dev/sda1 | less
df
cd
mkdir filerendszer
cd filerendszer/
ls
echo "qwerty" > file
df
w
who
df
rm file
df
echo "qwerty" > file
df
ls
ls -l
cat file 
bc 
dd if=/dev/zero of=12x4kB bs=4k count=12
df
ls -l
echo "x">> 12x4kB 
df
echo "    sg sg  sg ">> 12x4kB 
df
df
ls -l
df
echo "    sg sg  sg ">> 12x4kB 
df
echo "    sg sg  sg ">> 12x4kB 
ls -l
df
ls -la
cd ..
ls
ls -l
ls -la
pwd
cd filerendszer/
ls
df
ls
ln file f2
df
ls -i file
ls -i f2
vi file
catg file 
cat file 
cat f2
ls -l
rm file
ls -l
ln f2 f3
ls f3 f4
ln f3 f4
ls -l
df
ln -s f2 f5
df
ls -l
vi f5
ls -l
cat f3
rm f2
cat f3
cat f5
ls -l
echo kuka > f2
cat f5
cat f3
cat f4
echo kaka2 >> f5
cat f5
cat f2
cd /lib
ls
cd /var
ls
ls -l
adduser bela
which adduser
vi/usr/sbin/adduser
vi /usr/sbin/adduser
tail /etc/passwd
userdel
userdel bela
userdel
vi /usr/sbin/adduser
tail /etc/passwd
vi /etc/security/limits.conf 
exit
ifconfig 
who
cd /etc/security/
vi limits.conf 
mutt
man nameif
ifconfig eth0
man ifconfig
route
ifconfig 
route
cat /etc/network/interfaces 
man ifconfig
cd /proc/sys
ls
vi /etc/sysctl.conf 
lde
cd 
ls
 echo valami >file
ls -i file
lde -i 2411902 /dev/sda1
df