Commands using sudo (537)
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find the files locked by rcs utility Show Sample Output
0find /path/to/folder/ -mindepth 1 -maxdepth 2 -name "*,v" -exec sudo rlog -L -R {} \; -
-T = traceroute -V = verbose --tr-stop = exit when target is reached -n = don't do reverse lookups (faster) -2 = udp -p 53 = destination port 53 (dns), change to your needs Useful when trying to debug a network with complex routing rules and/or multiple gateways.
0sudo hping3 -TV --tr-stop -n -2 -p 53 ns1.server.tld -
0sudo usermod -a -G adm "$(whoami)"
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Requires 'reflector' package from official repository. '5' in the example is the number of mirrors you want in the mirrorlist, could be other numbers of course.
0sudo reflector -l 5 -r -o /etc/pacman.d/mirrorlist -
Clears the package cache of all uninstalled packages. Does not remove package configuration files in user's home directory.
0sudo pacman -Sc -
Clears the package cache of all packages, installed and uninstalled packages. Do NOT USE if you might want to downgrade a package later.
0sudo pacman -Scc -
Removes the package, 'packagename' in the example ,from your system. '-R' is the actual removal option, 'n' is for removing backup configuration files saved by pacman, and 's' is for removing the dependencies of the given package which are not required by other packages. pacman does not remove configuration files, etc. created by the package.
0sudo pacman -Rns packagename -
0sudo lsof | grep 'DEL.*lib' | cut -f 1 -d ' ' | sort -u
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0sudo env ARCHFLAGS="-arch x86_64" gem install mysql
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Extracting .gz files and placing the output in another directory in one command line is convenient thing. I just followed some how-to to install Nagios on Ubuntu Lucid Lynx but they give the method to install from archives. I wished to install from the repository. If you do so some files are missing. I've not tested yet but this is an example command line I did to extract sudo sh -c 'gunzip -c /usr/share/doc/nagios3-common/examples/template-object/templates.cfg.gz > /etc/nagios3/objects/templates.cfg' We need privilege to write the destination file. Show Sample Output
0sudo sh -c 'gunzip -c source.gz > destination' -
Usage: VBoxBlockBoot [Virtual_Machine] [Block_device] Eg: VBoxBlockBoot WinXP /dev/sdc In another words
vm=usb; usb=sdc;sudo umount /dev/$usb* ; sudo chmod 777 /dev/$usb ; VBoxManage storageattach $vm --medium ~/raw-HD-4-VB/$usb.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm $vmWhere vm --> Name of the virtual machine to start usb --> Block device to use. (/dev/sdc) This can used after setup up a boot loader on to my USB pen drive or HDD (After creating Live USB). Here root privilege is needed but not granted to Virtual Box. Thus we can access all our VM.( If we run VBox as root we can't access our VMs). Root privilege is used to - Unmount the storage device - Chmod to full access (777) Requirements:- 1. Device information file (rawvmdk file) created by the following command. Need to run only once. Not bad to run many.VBoxCreateRawDisk() { VBoxManage internalcommands createrawvmdk -filename ~/.rawHD4VB_`basename "$1"`.vmdk -rawdisk "$1"; }2. Root privilege to umount & chmod 3. Real storage medium (ie /dev/*) (Non-virtual such as USB HD, pen drive, a partition) 4. A virtual m/c already available (here "usb") vm=usb; usb=sdc;sudo umount /dev/$usb* ; sudo chmod 777 /dev/$usb ; VBoxManage storageattach $vm --medium ~/raw-HD-4-VB/$usb.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm $vm VBoxBlockBoot() { sudo umount "$2"*; sudo chmod 777 "$2"; VBoxManage storageattach "$1" --medium ~/.rawHD4VB_`basename "$2"`.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm "$1"; } Show Sample Output0VBoxBlockBoot() { sudo umount "$2"*; sudo chmod 777 "$2"; VBoxManage storageattach "$1" --medium ~/.rawHD4VB_`basename "$2"`.vmdk --type hdd --storagectl "IDE Controller" --device 0 --port 0 ; VBoxManage startvm "$1";} -
Removes all kernels and corresponding packages except of the one you're currently using.
0sudo apt-get -y purge $(dpkg --get-selections | awk '((/^linux-/) && (/[0-9]\./) && (!/'"`uname -r | sed "s/-generic//g"`"'/)) {print $1}') -
0sudo ettercap -T -w out.pcap -i wlan0 -M ARP // //
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0sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep udp && echo && sudo netstat|head -n2|tail -n1 && sudo netstat -a|grep tcp
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Find which directories on your system contain a lot of files. Edit: much shorter and betterer with -n switch. Show Sample Output
0sudo find / -type f | perl -MFile::Basename -ne '$counts{dirname($_)}++; END { foreach $d (sort keys %counts) {printf("%d\t%s\n",$counts{$d},$d);} }'|sort -rn | tee /tmp/sortedfilecount.out | head -
after kernel build with make deb-pkg, I like to install the 4 newest packages that exist in the directory. Beware: might be fewer for you....
0sudo dpkg -i `ls -tr *.deb | tail -n4` -
0sudo tcpdump -n -i eth0 -w data.pcap -v tcp or udp and 'not host 192.168.1.2'
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Unmounts all CIFS-based network drives. Very nice for shutting down network mounts on a Linux laptop just prior to going to sleep. Show Sample Output
0for D in `mount -lt cifs | sed 's/.*on \(\/.\+\) type.*/\1/'`; do echo -n "UNMOUNTING $D..."; sudo umount $D; echo " [DONE]"; done; -
Starts the Nessus daemon, downloads and processes the plugins.
0sudo /opt/nessus/sbin/nessusd -
This short snippet outputs the state of all containers available on your system. It is quite helpful to see which ones are running and which are stopped. Please notice that the "sort -u" is needed, otherwise running containers will be reported twice (see output of "lxc-ls" on its own for why) Show Sample Output
0lxc-ls | sort -u | xargs -i sudo lxc-info -n {} -
0sudo dd if=/dev/block/device bs=1MB | pv -s `sudo blockdev --getsize64 /dev/block/device' | gzip -9 > output.img.gz
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0sudo ps aux --sort:rss | awk '{print $2"\t"$11": "$6/1024" MB"}' | column -t | less
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Check to see if a port is open or closed on a given host. Show Sample Output
0checkport() { sudo nmap -sS -p $1 $2 } -
Lets you change/set a governor to handle the frequency of your CPU. Available governors are: "powersave", "conservative", "ondemand", "performance", and "userspace".
0sudo cpupower frequency-set -g <frequency governor> -
Allows for manual set of the CPU's frequency. First look at "cpupower frequency-info" for all the available frequency steps your processor can be set at. e.g. sudo cpupower frequency-set -f 1100MHz
0sudo cpupower frequency-set -f <frequency in MHz> - ‹ First < 10 11 12 13 14 > Last ›
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