Commands tagged arch linux (15)

  • An alternative to: python -m SimpleHTTPServer for Arch Linux

    An alternative to: python -m SimpleHTTPServer for Arch Linux source: http://archlinux.me/dusty/2010/01/15/simplehttpserver-in-python-3/ Show Sample Output


    6
    python3 -m http.server
    TheShadowFog · 2011-12-07 23:43:21 17
  • Arch Linux sort installed packages by size

    This one-liner will output installed packages sorted by size in Kilobytes. Show Sample Output


    4
    paste <(pacman -Q | awk '{ print $1; }' | xargs pacman -Qi | grep 'Size' | awk '{ print $4$5; }') <(pacman -Q | awk '{print $1; }') | sort -n | column -t
    BruceLEET · 2011-01-07 18:43:18 8
  • Remove orphaned dependencies on Arch

    -Qdt Lists dependencies/packages which are no longer required by any packages -q Output only package name (not the version number) -R Remove package(s) Rest is self-explanatory. I just started out with Arch - so if there is any better/standard method to achieve the same - please suggest.


    4
    pacman -Qdt -q | xargs pacman --noconfirm -R
    b_t · 2014-02-27 05:17:57 41
  • 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 1196
  • Arch Linux: Always install software without asking

    Adding this alias to ~/.bashrc or, better yet, the system-wide /etc/bash.bashrc (as in my setup) will make it possible to not only run pacman as any user without needing to prepend sudo but will also ensure that it always assumes that the user knows what he or she is doing. Not the best thing for large multi-user enterprise setups at all to say the least, but for home (desktop) use, this is a fantastic time-saver.


    3
    alias pacman=‘sudo pacman --noconfirm’
    realkstrawn93 · 2021-12-28 20:29:13 1068
  • Arch Linux: Search for missing libraries using pacman

    If, while using a program, you get an error similar to: error while loading shared libraries: libusb-0.1.so.4: cannot open shared object file: No such file or directory Use pacman or pkgfile to search for the package that owns the missing library https://wiki.archlinux.org/index.php/General_troubleshooting#Message:_%22error_while_loading_shared_libraries%22 Show Sample Output


    2
    pacman -Fs libusb-0.1.so.4
    Mouath · 2019-03-07 16:15:10 45
  • Display IP : Count of failed login attempts

    The lastb command presents you with the history of failed login attempts (stored in /var/log/btmp). The reference file is read/write by root only by default. This can be quite an exhaustive list with lots of bots hammering away at your machine. Sometimes it is more important to see the scale of things, or in this case the volume of failed logins tied to each source IP. The awk statement determines if the 3rd element is an IP address, and if so increments the running count of failed login attempts associated with it. When done it prints the IP and count. The sort statement sorts numerically (-n) by column 3 (-k 3), so you can see the most aggressive sources of login attempts. Note that the ':' character is the 2nd column, and that the -n and -k can be combined to -nk. Please be aware that the btmp file will contain every instance of a failed login unless explicitly rolled over. It should be safe to delete/archive this file after you've processed it. Show Sample Output


    1
    sudo lastb | awk '{if ($3 ~ /([[:digit:]]{1,3}\.){3}[[:digit:]]{1,3}/)a[$3] = a[$3]+1} END {for (i in a){print i " : " a[i]}}' | sort -nk 3
    sgowie · 2012-09-11 14:51:10 24
  • Arch Linux sort installed packages by size


    0
    pacman -Qi $(pacman -Qq)|grep 'Name\|Size'| cut -d: -f2 | paste - - | column -t | sort -nk2
    minus · 2011-05-03 13:02:06 5
  • Arch Linux sort installed packages by size

    M is size in megabytes, man expac to see other sizes %m is install size %k is download size


    0
    expac -S -H M "%m %n"|sort -n
    gtmanfred · 2012-06-14 19:41:21 4
  • rename bunch of movie and srt files to all work with each other

    I used this (along with a modified one replacing `mkv` with `srt`) to remove the slight differences in who the provider of the video / matching subtitle was (as they are the same contents and the subs match anyway). So now VLC (and other video players) can easily guess the subtitle file. Show Sample Output


    0
    perl-rename -v 's/720p.+mkv/720p\.mkv/' *.mkv
    benkaiser · 2014-09-25 14:07:47 10
  • Arch Linux sort installed packages by size

    This version accounts for the MiB/KiB suffix output by pacman these days.


    0
    pacman -Qi | grep 'Name\|Size\|Description' | cut -d: -f2 | paste - - - | awk -F'\t' 'BEGIN{ s["MiB"]=1024; s["KiB"]=1;} {split($3, a, " "); print a[1] * s[a[2]], "KiB", $1}' | sort -n
    Timo · 2018-04-24 13:29:57 286
  • Add a repo to pacman


    0
    echo -e "\n[sublime-text]\nServer = https://download.sublimetext.com/arch/dev/x86_64" | sudo tee -a /etc/pacman.conf
    HaoZeke · 2018-08-13 07:30:55 469
  • Get an audio notification if a new device is attached to your computer

    dmesg -t: no timestamp -W: follow new messages -l: log-level notice gawk if the fourth word is "Attached" echo a sentence through espeak


    0
    dmesg -tW -l notice | gawk '{ if ($4 == "Attached") { system("echo New device attached | espeak") } }
    BigZ · 2020-09-06 08:18:26 719
  • Clean or clean pacman and pamac cache


    0
    sudo pacman -Scc && pamac clean -b
    bugmenot · 2022-08-24 19:10:38 745
  • Arch Linux sort installed packages by size

    This, like the other commands listed here, displays installed arch packages. Unlike the other ones this also displays the short description so you can see what that package does without having to go to google. It also shows the largest packages on top. You can optionally pipe this through head to display an arbitrary number of the largest packages installed (e.g. ... | head -30 # for the largest 30 packages installed) Show Sample Output


    -1
    pacman -Qi | grep 'Name\|Size\|Description' | cut -d: -f2 | paste - - - | awk -F'\t' '{ print $2, "\t", $1, "\t", $3 }' | sort -rn
    GetterNoCheddar · 2012-11-20 03:40:55 11

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Search commandlinefu.com from the command line using the API
Search for one/many words on commandlinefu, results in vim for easy copy, manipulation. The -R flag is for readonly mode...you can still write to a file, but vim won't prompt for save on quit. What I'd really like is a way to do this from within vim in a new tab. Something like $ :Tex path/to/file but $ :cmdfu search terms

One liner to kill a process when knowing only the port where the process is running

List the size (in human readable form) of all sub folders from the current location
Simple and easy to remember. -h is human, -d1 = depth 1. disk usage, human, depth 1

Use file(1) to view device information
file(1) can print details about certain devices in the /dev/ directory (block devices in this example). This helped me to know at a glance the location and revision of my bootloader, UUIDs, filesystem status, which partitions were primaries / logicals, etc.. without running several commands. See also: $ file -s /dev/dm-* $ file -s /dev/cciss/* etc..

Super Speedy Hexadecimal or Octal Calculations and Conversions to Decimal.
^Hexadecimal Ten minus Octal Ten is Eight(in Decimal). $ echo "$(( 0xaf )) = $(( 0257 ))" ^Hexadecimal AF and Octal 257 are both Decimal 175.

Kill all processes belonging to a user

Define shell variable HISTIGNORE so that comments (lines starting with #) appear in shell history
I was surprised to find that with RedHat bash, I could not find any comment lines (begining with #) in my bash shell history. Surprised because in Mageia Linux this works. It turns out that RedHat's bash will keep comment lines if in my .bashrc, I define: export HISTIGNORE=' cd "`*: PROMPT_COMMAND=?*?' Why have comment lines in shell history? It's a handy and convenient way to make proto-commands (to be completed later) and for storing brief text data that is searchable in shell history.

Remove security limitations from PDF documents using ghostscript (for Windows)
#4345 also works under windows

Find chronological errors or bad timestamps in a Subversion repository
Lists revisions in a Subversion repository with a timestamp that doesn't follow the revision numbering order. If everything is OK, nothing is displayed.

Find last modified files in a directory and its subdirectories
Goes through all files in the directory specified, uses `stat` to print out last modification time, then sorts numerically in reverse, then uses cut to remove the modified epoch timestamp and finally head to only output the last 10 modified files. Note that on a Mac `stat` won't work like this, you'll need to use either: $ find . -type f -print0 | xargs -0 stat -f '%m%t%Sm %12z %N' | sort -nr | cut -f2- | head or alternatively do a `brew install coreutils` and then replace `stat` with `gstat` in the original command.

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