# ifconfig | awk '/^eth0/' the above command will print the Mac address as OUTPUT: eth0 Link encap:Ethernet HWaddr 00:12:B1:57:AB:52 Command to get the mac address of a machine # ifconfig | awk '/^eth0/ {print $5}' OUTPUT: 00:12:B1:57:AB:52 ..
If you forget your password for compressed archive (rar, 7z, zip), RarCrack is the solution. RarCrack uses a brute-force algorithm to find correct password. You can specify which characters will be used in password generations. Preparing your system for installation Install the following package # aptitude install libxml2-dev build-essential Download the latest version of ..
Update twitter using curl This function will update your tweet from command line tweet(){ [ ${#1} -lt 141 ] && curl -su user:pass -d source=curl -d status="$1" http://twitter.com/statuses/update.xml >/dev/null || echo $(( ${#1} - 140 )) too many characters >&2; } This one is long, but includes error checking and will let you ..
View user activity per directory. lsof -u someuser -a +D ./ View all files opened by a user in specified directory. The +D option makes lsof search all sub-directories to complete depth, while ignoring symbolic links. OUTPUT: COMMAND PID USER FD TYPE DEVICE SIZE/OFF ..
Find and delete thunderbird's msf files to make your profile work quickly again. find ~/.thunderbird/*.default/ -name *.msf -exec rm -f {} \; Find command will find the msf file from the specified home directory or location and the exec command will remove the file found by using find command. ..
nmap Command to list the system on network connection nmap -sP 192.168.1.0/24 OUTPUT: Starting Nmap 4.68 ( http://nmap.org ) at 2010-06-06 20:38 IST Host w3calculator.com (192.168.1.1) appears to be up. Host w3calculator.com (192.168.1.2) appears to be up. Nmap done: 256 IP addresses (2 hosts up) scanned in 1.144 seconds The nmap command will list number of host ..
Linux Command to create temp file tempfile=$(/bin/mktemp) Linux Command to create temp directory tempdir=$(/bin/mktemp -d) ..
If you dislike Fedora's default behaviour of showing all the valid users on the workstation during a X-windows login this will make the user type a userid and password. gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.defaults --type bool --set /apps/gdm/simple-greeter/disable_user_list true ..
Find a Package Version on Debian based distribution dpkg-query -W -f='${Version}\n' package-name The command will query the package list of debian packages and will list the distribution. ..
find . -type f | xargs ls -ltrhg find and list normal files and list them sorting with modification time without group l: with detailed information t: sort with modification time r: reverse order h: show file's size in human-readable format, such as K(kilobytes), M(megabyes) etc. g: do not show group ..
How to find linux distribution installed on your machine? cat /etc/*release Output Fedora release 10 (Cambridge) Fedora release 10 (Cambridge) Fedora release 10 (Cambridge) This command works in all all linux distros. ..
How do I print a file in reverse order? tac -r -s "." FILENAME Example: Lets consider a file print_reverse.sh cat print_reverse.sh for x in $(grep -r "isam" test) do echo $x done tac -r -s "." print_reverse.sh eno dx$ ohc eo d)tset "masi" r- perg($ ni x ro ..
tail -fs 1 somefile The -s option allows you to specify the update interval tail -f somefile | while read line ; do echo $line ; sleep 1; done Tail a file at one line per second. The sleep value 1 in this case controls the update speed of tail -f. ..
yum list available This command will list all the available packages in yum repository How to list just one repo with yum. First I disable all repo, second I enable just the repo that I want to list. yum --disablerepo=* --enablerepo=epel list available ..
Find memory usage of a particular process or command by a user ps -o comm,%mem,args -u nobody output: proftpd 0.2 proftpd: (accepting connections) mysqld 1.0 /opt/lampp/sbin/mysqld --basedir=/opt/lampp.... httpd ..