Linux useful commands
I’m saving these useful commands here so that you can easily access them when needed.
CUT
cut -d " " -f 1 notes
cut -d " " -f 1-10 notes
cut -d " " -f 1 test.txt --complement # returns fields other than the selected fields.
cut -c-1-10 test.txt # for characters
LN
ln -s test.txt test2.txt
ln test.txt test2.txt # only in the same directory
TR
cat notes | tr -s '[a-z]' '[A-Z]'
cat notes | tr -d '[a-zA-Z: ]'
tr -d '[:blank:]'
cat notes | tr -d 'blabla'
LS
ls
ls -l # list type sorting
ls -a # show hidden files
ls -h # file size
ls --recursive #
FIND
find / -type f -group alper 2>/dev/null
find /path/to/search -type f -ctime +7 -ctime -30
find /path/to/search -type f -ctime -7
find /path/to/search -type f -ctime 0 # last 24 hours
find /path/to/search -type f -mmin -360 # last 6 hours
find / -type f \( -perm -4000 -o -perm -2000 \) -exec ls -l {} \; 2>/dev/null
find / -type f \( -name note1 -o -name note2 -o -name note3 \) -exec ls -la {} \; 2>>/dev/null
find . -type f -exec strings {} \; | grep -i "STMCTF"
STRINGS
strings -e l -n 10 notes
strings -f -n 10 notes
TCPDUMP
tcpdump -r network.pcap tcp
tcpdump -r network.pcap tcp -v
tcpdump -r network.pcap port <port_numarası>
tcpdump -r network.pcap src <kaynak_ip_adresi>
tcpdump -r network.pcap src <kaynak_ip_adresi> and dst <hedef_ip_adresi>
tcpdump -r network.pcap host <ip_adresi> and port <port_numarası>
tcpdump -r network.pcap -w filtered.pcap tcp
CRUNCH
crunch 5 6 "20341zxcvbn_masdfghjklqwerityuıopH\!" -o wordlist.txt
crunch 3 3 abcdefghijklmnopqrstuvwxyz -o wordlist.txt
crunch 3 3 -t @%, -o custom_wordlist.txt
crunch 5 8 abcdefghijklmnopqrstuvwxyz -d 2@ -o no_repeat_wordlist.txt # not use 2 consecutive letters
crunch 6 6 -t ^l^u^@ -o mixed_case_wordlist.txt
# @ - lower case alpha characters
# , - upper case alpha characters
# % - numeric characters
# ^ - special characters including space
RDP
xfreerdp /u:kullanici_adi /p:parola /v:ip_adresi
xfreerdp /dynamic-resolution +clipboard /cert:ignore /v:MACHINE_IP /u:Administrator /p:'TryH4ckM3!'
rdesktop 10.10.81.92
MYSQL
systemctl enable --now mysql
systemctl stop mysql
mysql -u root -p
show databases;
use users;
show tables;
DESCRIBE users;