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Quick Linux Command Reference

• List CDROM info:
  cat /proc/sys/dev/cdrom/info
• Mount .iso under an empty directory:
  mount -o loop file.iso /mount_point
• Rip data CD
  dd if=/dev/cdrom of=cd_image.iso
• Write ISO to USB Flash drive
  dd if=cdrom.iso of=/dev/sdx bs=2048 conv=sync,notrunc
• Download the latest Slackware64 Patches (14.1)
  wget -mirror -nd ftp://slackware.mirrors.tds.net/pub/slackware/slackware64-14.1/patches/packages/*.txz
• Download the latest Slackware64 Patches (13.37)
  wget -mirror -nd ftp://slackware.mirrors.tds.net/pub/slackware/slackware64-13.37/patches/packages/*.txz
• Download the latest Slackware64 Patches (13.1)
  wget -mirror -nd ftp://slackware.mirrors.tds.net/pub/slackware/slackware64-13.1/patches/packages/*.txz
• Download the latest Slackware Patches (13.1)
  wget -mirror -nd ftp://slackware.mirrors.tds.net/pub/slackware/slackware-13.1/patches/packages/*.txz
• Download the latest Slackware Patches (12.2)
  wget -mirror -nd ftp://slackware.mirrors.tds.net/pub/slackware/slackware-12.2/patches/packages/*.tgz
• Check the md5sums of the downloaded patches:
  sed -n "s_\./packages/__;/.*\.txz$/p" CHECKSUMS.md5 | md5sum -c
• Create a MD5 checksum file:
  find ./* -type f -print0 | xargs -0 md5sum > CHECKSUMS.MD5
• List Deleted Open Files:
  lsof | grep '(deleted)'
• Copy directory structure:
  rsync -a --include '*/' --exclude '*' /path/to/source /path/to/dest
• Extract .tar.gz (or .tgz)
  tar xzvf <archive name>
• Extract .bz2 (or .tbz2)
  tar xjvf <archive name>
• Backup files:
  rsync --verbose --progress --stats --compress --rsh=/usr/bin/ssh --recursive --times --perms --owner --group [--delete] /sourcedir/* xxx.xxx.xxx.xxx:/destdir
• Combine multiple avi files into one:
  mencoder -oac copy -ovc copy -o output.avi input1.avi input2.avi
• Backup DVD to harddrive (need to mount first)
  vobcopy -m -o /dest/path/
• Set up a SOCKS proxy
  ssh -D <port> <host>
• Check ntp servers
  ntpq -p
• Check installed PEAR packages
  pear list -a
• Get public IP address from ifconfig.me (icanhazip.com and whatismyip.org work similar):
  curl ifconfig.me
• Resolve NetBIOS name
  nbdlookup <server>
• Run a script remotely
  ssh user@host 'bash -s' < /path/script