Commands tagged iso9660 (5)

  • Write a bootable Linux .iso file directly to a USB-stick

    Writes hybrid ISO directly to USB stick; replace /dev/sdb with USB device in question and the ISO image link with the link of your choice


    4
    wget -O /dev/sdb https://cdimage.ubuntu.com/daily-live/current/eoan-desktop-amd64.iso
    realkstrawn93 · 2019-09-19 04:03:13 0
  • find filenames and directory names that doesn't conform ISO 9660 level 2

    You might want to check what file and directory names would be renamed or chopped if you create iso 9660 level 2 image out of them. Use this command to check first. Show Sample Output


    1
    find . -regextype posix-extended -not -regex '.*/[A-Za-z_]*([.][A-Za-z_]*)?'
    zhangweiwu · 2010-06-25 00:27:09 0
  • Extract files from an ISO image without being root

    "Vice versa xorriso is able to copy file objects out of ISO 9660 filesystems." -- http://www.gnu.org/software/xorriso/ Show Sample Output


    0
    xorriso -osirrox on -indev /tmp/pmagic-6.7.iso -report_about NOTE -extract / /tmp/extractedfiles
    pdurbin · 2012-05-26 10:48:59 0
  • Get Volume ID (Label) of ISO9660 CD-ROM

    The comp.unix.shell posting by St?phane Chazelas also lists the following offsets: type 32768 (1 byte) id 32769 (5 bytes) version 32774 (1 byte) system_id 32776 (32 bytes) volume_id 32808 (32 bytes) volume_space_size 32848 (8 bytes) escape_sequences 32856 (32 bytes) volume_set_size 32888 (4 bytes) volume_sequence_number 32892 (4 bytes) logical_block_size 32896 (4 bytes) path_table_size 32900 (8 bytes) type_l_path_table 32908 (4 bytes) opt_type_l_path_table 32912 (4 bytes) type_m_path_table 32916 (4 bytes) opt_type_m_path_table 32920 (4 bytes) root_directory_record 32924 (34 bytes) volume_set_id 32958 (128 bytes) publisher_id 33086 (128 bytes) preparer_id 33214 (128 bytes) application_id 33342 (128 bytes) copyright_file_id 33470 (37 bytes) abstract_file_id 33507 (37 bytes) bibliographic_file_id 33544 (37 bytes) creation_date 33581 (17 bytes) modification_date 33598 (17 bytes) expiration_date 33615 (17 bytes) effective_date 33632 (17 bytes) file_structure_version 33649 (1 byte) application_data 33651 (512 bytes)


    0
    dd if=/dev/cdrom bs=1 skip=32808 count=32 conv=unblock cbs=32 2>/dev/null
    mlk · 2013-04-14 20:50:58 0
  • Write a bootable Linux .iso file directly to a USB-stick (macOS edition)

    Some of us have both Macs *and* Linux machines — so it makes sense to know how to run this command on the former in the event that a botched reinstallation renders the latter unbootable.


    -2
    sudo curl -L -o /dev/disk4 https://some-distributor.org/some-distro.iso
    realkstrawn93 · 2022-06-20 17:25:39 0

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Check disk for bad sectors
Checks HDD for bad sectors, just like scandisk or chkdisk under some other operating system ;-).

Test load balancers
With the "--resolve" switch, you can avoid doing DNS lookups or edit the /etc/hosts file, by providing the IP address for a domain directly. Useful if you have many servers with different IP addresses behind a load balancer. Of course, you would loop it: $ for IP in 10.11.0.{1..10}; do curl --resolve subdomain.example.com:80:$IP subdomain.example.com -I -s; done

Quick network status of machine
credit to tumblr engineering blog @ http://engineering.tumblr.com/

ssh to machine behind shared NAT
Useful to get network access to a machine behind shared IP NAT. Assumes you have an accessible jump host and physical console or drac/ilo/lom etc access to run the command. Run the command on the host behind NAT then ssh connect to your jump host on port 2222. That connection to the jump host will be forwarded to the hidden machine. Note: Some older versions of ssh do not acknowledge the bind address (0.0.0.0 in the example) and will only listen on the loopback address.

Search some text from all files inside a directory

Tunnel ssh through Socks Proxy
If you are blocked or need to use a Socks proxy

Get AWS temporary credentials ready to export based on a MFA virtual appliance
You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

Debug your makefile
Say your dependencies specified in your Makefile (or dates on your source files) is causing 'make' to skip some source-files (that it should not) or on the other other end, if it is causing make to always build some source-files regardless of dates of target, then above command is handy to find out what 'make' thinks of your date v/s target date-wise or what dependencies are in make's view-point. The egrep part removes the extra noise, that you might want to avoid.

Trigger a command each time a file is created in a directory (inotify)
Listens for events in the directory. Each created file is displayed on stdout. Then each fileline is read by the loop and a command is run. This can be used to force permissions in a directory, as an alternative for umask. More details: http://en.positon.org/post/A-solution-to-the-umask-problem%3A-inotify-to-force-permissions

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

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