mkdir ea3 cd ea3/ vi szoveg cat szoveg | grep -o 'a*' cat szoveg cat szoveg | grep 'a*' cat szoveg | grep '^a*$' vi szoveg cat szoveg | grep '^a*$' vi szoveg cat szoveg cat szoveg | grep '^a*$' cat szoveg | grep '^a+$' cat szoveg cat szoveg | egrep '^a+$' cat szoveg | egrep '^a?$' cat szoveg | egrep '^a{4}$' cat szoveg | egrep '^a{3}$' cat szoveg | egrep '^a{3,}$' cat szoveg | egrep '^a{3,5}$' cat szoveg | egrep '^a{1,5}$' cat szoveg | egrep '^a{1,3}$' vi szoveg cat szoveg | egrep '^ba{1,3}$' vi szoveg cat szoveg | egrep '^ba{1,3}$' cat szoveg | egrep '^(ba){1,3}$' vi szoveg cat szoveg | egrep '^(c|(ba){1,3})$' cat szoveg | egrep '^(c|(ba)){1,3}$' vi szoveg cat szoveg cat szoveg | egrep '^(c|(ba)){1,3}$' vi szoveg cat szoveg | egrep '^(c|(ba)){1,3}$' vi szoveg cat szoveg | egrep '^(c|(ba)){1,3}$' vi szoveg cat szoveg cat szoveg | egrep '^(c|(ba)){1,3}$' vi szoveg cat szoveg | egrep '^(c|(ba)){1,3}$' vi ft cat ft egrep '^[+-]?[0-9]+(,[0-9]*[1-9])?V$' ft cat ft | grep -E '^[+-]?[0-9]+(,[0-9]*[1-9])?V$' cat ft | grep -E '^[+-]?[0-9]+(,[0-9]*[1-9])?[mk]?V$' vi ft cat ft | grep -E '^[+-]?[0-9]+(,[0-9]*[1-9])?[mk]?V$' vi mondat egrep '^[A-Z][^\.\?!]*[\.\?!]$' mondat cat em cat mondat egrep '^[A-Z][^\.\?!]*[\.\?!]$' mondat egrep '^[^a-z][^\.\?!]*[\.\?!]$' mondat vi betuk cat betuk cat betuk | egrep '^[^a-z]$' cat betuk | egrep '^[a-z]$' cat betuk | grep -E '^[a-z]$' cat betuk | grep -E '^[a-z]*$' cat betuk | grep -E '^[A-Z]*$' man grep man grep ls ls -i szoveg ls ls | sort ls | sort | head -n 1 vi s cat s | sed 's/kutya/szalonna/' cat s | sed 's/kutya/szalonna/g' cat s | sed 's/kutya/szalonna/g' echo alma | sed 's/a/b/' echo alma | sed 's/a/b/g' echo alma | sed 's/a*/b/g' vi at which awk vi at chmod at chmod 755 at ./at cat st cat at awk 'BEGIN{system("ls -la");}' vi /etc/passwd cat /etc/shadow sudo su vi /etc/passwd chsh cat /etc/passwd | grep lencse cat /etc/passwd | grep lencse chsh chfn chfn cat /etc/passwd | grep lencse chfn chfn cat /etc/passwd | awk -F \: '{print $1}' cat /etc/passwd | awk -F \: '{print $2}' cat /etc/passwd | awk -F \: '{print $3}' cat /etc/passwd | awk -F \: '{print $4}' cat /etc/passwd | awk -F \: '{print $5}' cat /etc/passwd | awk -F \: '{print $6}' cat /etc/passwd | awk -F \: '{print $7}' cat /etc/passwd | awk 'BEGIN{FS=”:”; min=1000; max=65000; count=0} {if ($3 >= min && $3 <= max) { print $1 ; count=count+1 }} END {print count}' cat /etc/passwd | awk 'BEGIN{FS=”:”; min=1000; max=65000; count=0} {if ($3 >= min && $3 <= max) { print $1 ; count=count+1 }} END {print count}' ls cat mondat wc mondat vi pwc cat mondat | wc cat mondat | pwc cat mondat | ./pwc chmod ./pwc chmod 755 ./pwc cat mondat | ./pwc cat pwc awk 'BEGIN{system("ls -la");}' find /usr -name awk find /usr -name awk 2>/dev/null # find / -name core find / -name core 2>/dev/null ls -l /etc/passwd which passwd ls -l $(which passwd) find / -perm /4000 find / -perm /4000 2>/dev/null find /usr/bin -name pass* touch passy find / -perm /4000 2>/dev/null find /usr/bin -name pass* find /usr/bin -name "pass*" touch x.jpg z.jpg la ls mkdir aa touch aa/x.jpg ls aa find ./ -name "*.jpg" ls "*.jpg" ls ls *.jpg vi jc chmod 755 jc ./jc grep lencse /etc/passwd cat /etc/passwd | grep lencse grep lencse cat /etc/passwd | grep lencse cat /etc/passwd | grep -o lencse cat /etc/passwd | grep -i -o lencse cat /etc/passwd | grep -i -o lencse # nem kul. meg a kis es nagyb. vi macex cat macex | grep -E '([[:xdigit:]]{2}:){5}[[:xdigit:]]{2}' cat macex