Tag Archives: commands

linux – file commands

 diff <file1> <file2> compare files
 rm -rf <dir> force delete of <dir>
 touch -r <ref_file> <file> matches timestamp <file> to <ref_file>
 touch -t <YYYYMMDDHHSS> <file> set <file> timestamp
 sudo fdisk -i list connected drives
 file <file> determine file type info
 mount /dev/sda# /mnt/usbdrive mount usb drive
 echo -n “<string>” | md5sum generate md5 hash for <string>
 md5sum -t <file> generate md5 hash for <file>
 echo -n “<string>” | sha1sum generate sha1 hash for <string>
 sha1sum <file> generate sha1 hash for <file>
 sort -u <file> sort unique lines in <file>
 grep -c “<string>” <file> count lines with <string> in <file>
 shred -f -u <file>overwrite / delete files
 dos2unix <file> convert <file> to unix format
 find -iname “*<string>*” find files with <string> in the filename
 find / -perm -4000 -o -perm -2000 find suid and gid files
 split -b <size> <file> split <file> in <size> blocks
 awk ‘sub(“$”, “\r”)’ <file_input> > <file_output> convert <file_input> to windows format
 dd skip=1000 count=2000 bs=8 if=<file> of=<file> cut block 1K-3K from <file>
 chattr <+/->i <file> set / unset immutable bit
tail -f * find modified files in current dir
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linux – system info commands

getent passwdshow list of users
idcurrent username
wlogged on users
who -aextra user information
last -alast users logged on/in
cat /etc/issueshow information about os
cat /etc/*release*show more os information
cat /proc/versionshow kernel info
uname -ashow kernel info + cpu info
pkginfoshow installed packages on Solaris
dpkg –get-selectionsshow installed packages on Ubuntu
dpkg -I *.debinstall Debian package
rpm –query -allshow installed packages on Redhat
rpm -ivh *.rpminstall rpm package
ps -efshows all the processes
kill <pid>kill the process with id <pid>
$PATHshows the path
PATH=$PATH:<path>add <path> to path
which <program>show the location for <program> (ex: bash)
df -hdisk usage
mountlist mounted file systems
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windows – simple network commands

ipconfig /alldisplay information about all network interfaces currently in operation
ipconfig /displaydnsdisplay local DNS cache
arp -adisplay the ARP table
netsh wlan show profilesshow saved wireless profiles
netsh firewall set opmode disabledisable the firewall old style
netsh advfirewall set currentprofile state offdisable windows firewall
netsh  advfirewall set allprofiles state offdisable windows firewall
netsh wlan export profile folder=. key=clearexport wifi keys as plaintext in xml file
netsh interface ip show interfaceslist interface with id’s/mtu’s
netsh interface ip set address local static <ip> <mask> <gw> <id>set ip for interface
netsh interface ip set dns local static <ip>set DNS server for interface
netsh interface ip set address local dhcpset interface to use DHCP
netstat -anolist open connections
netstat -anop tcp 1netstat loop
netstat -an| findstr LISTENINGlist all listening ports
route printlist routing talbe
route add <dst_ip> mask <subnetmsk_gw_ip> metric <costmetric> if <int>add static ip route
nslookup
> set type=any
> ls -d <domain>
 DNS zone transfer
tftp -I <ip> GET <file on tftpserver>tftp file transfer
net view /domainshow hosts in current domain
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linux – simple network commands

ifconfigdisplay information about all network interfaces currently in operation
ss | lesslist out all connections
watch ss -tplist all tcp connections
netstat -antshow all tcp connections
netstat -anushow all udp connections
netstat -tulpnshow all all connections with PIDs
lsof -idisplay all established connection
smb://<ip>/<sharename>access Windows smb share
mount -t smbfs //<ip>/ADMIN$ /<folder>mount Windows Admin share
smbclient -U <user> \\\\<ip>\\<share>mount Windows share
ifconfig eth# <ip>/<cidr>set ip and subnetmask
ifconfig eth#:<int> <ip>/<cidr>set virtual network interface
iwlist <int> scanwifi scanner
dig -x <ip>domain lookup for ip
host <ip>domain lookup for ip
host -t SRV _<service>_tcp.url.comdomain SRV lookup
route add default gw <gw ip>set gateway
export MAC=xx:xx:xx:xx:xx:xxchange MAC
ifconfig <int> hw ether <MAC> change MAC
macchanger -m <MAC> <int>change MAC on Kali or Backtrack
ifconfig eth# mtu [size]change MTU size
dig @<ip> domain -t AXFRDNS zone transfer
host -l <domain> <nameserver>DNS zone transfer
ip xfrm state listprint existing VPN keys
/var/log/messages | grep DHCPlist DHCP assignments
echo “1” > /proc/sys/net/ipv4/ip_forwardturn on ip forwarding
tcpkill host <ip> and port <port>block ip with port
echo “nameserver x.x.x.x” > /etc/resolv.confadd DNS server
ip addr add <ip>/<cidr> dev eth#adds ‘hidden’ interface
nmblookup -A <ip>get hostname for <ip>
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