Commands tagged arch linux (15)

  • An alternative to: python -m SimpleHTTPServer for Arch Linux source: Show Sample Output

    python3 -m http.server
    TheShadowFog · 2011-12-07 23:43:21 10
  • This one-liner will output installed packages sorted by size in Kilobytes. Show Sample Output

    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 5
  • -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.

    pacman -Qdt -q | xargs pacman --noconfirm -R
    b_t · 2014-02-27 05:17:57 5
  • 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

    wget -O /dev/sdb
    realkstrawn93 · 2019-09-19 04:03:13 41
  • 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.

    alias pacman=‘sudo pacman --noconfirm’
    realkstrawn93 · 2021-12-28 20:29:13 262
  • If, while using a program, you get an error similar to: error while loading shared libraries: cannot open shared object file: No such file or directory Use pacman or pkgfile to search for the package that owns the missing library Show Sample Output

    pacman -Fs
    Mouath · 2019-03-07 16:15:10 20

  • 2
    sudo pacman -Scc && pamac clean -b
    bugmenot · 2022-08-24 19:10:38 237
  • 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

    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 2

  • 0
    pacman -Qi $(pacman -Qq)|grep 'Name\|Size'| cut -d: -f2 | paste - - | column -t | sort -nk2
    minus · 2011-05-03 13:02:06 3
  • M is size in megabytes, man expac to see other sizes %m is install size %k is download size

    expac -S -H M "%m %n"|sort -n
    gtmanfred · 2012-06-14 19:41:21 2
  • 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

    perl-rename -v 's/720p.+mkv/720p\.mkv/' *.mkv
    benkaiser · 2014-09-25 14:07:47 4
  • This version accounts for the MiB/KiB suffix output by pacman these days.

    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 16

  • 0
    echo -e "\n[sublime-text]\nServer =" | sudo tee -a /etc/pacman.conf
    HaoZeke · 2018-08-13 07:30:55 49
  • dmesg -t: no timestamp -W: follow new messages -l: log-level notice gawk if the fourth word is "Attached" echo a sentence through espeak

    dmesg -tW -l notice | gawk '{ if ($4 == "Attached") { system("echo New device attached | espeak") } }
    BigZ · 2020-09-06 08:18:26 231
  • 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

    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 4

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Recursively remove 0kb files from a directory

Find the top 10 directories containing the highest number of files
It can be used to pinpoint the path(s) where the largest number of files resides when running out of free i-nodes

mplayer webcam window for screencasts
When recording screencast some people like to have the image from their webcam, so the can show something, that can't be seen on the desktop. So starting mplayer with these parameters you will have a window with no frames, borders whatsoever, and selecting the window a hitting the "F" key you will bring it in fullscreen. if you want to position the frame somewhere else, you could play with the --geomeptry option where 100%:100% mean bottom right corner. The HEIGHT and WIDTH can't be changed as you like, since the most webcams support specified dimensions, so you would have to play with it to see what is supported

Get windows IPv4 and nothing else
May be useful to get user's ip address over the phone, as users struggle to read through a long ipconfig result.

Easily find latex package documentation
If the pdf/dvi/etc documentation for a latex package is already part of your local texmf tree, then texdoc will find and display it for you. If the documentation is not available on your system, it will bring up the package's webpage at CTAN to help you investigate.

Recover resolution when a fullscreen program crashes and you're stuck with a tiny X resolution
This forces X back to its maximum resolution configured. To get a list, type `xrandr'.

Find usb device in realtime
Using this command you can track a moment when usb device was attached.

"at" command w/o the resource usage/competition issues
EXAMPLES jb "next sun 12pm" "/bin/sh ~you/" & jb "2010-08-29 12:00:00" "~you/" & jb "29aug2010 gmt" ". ~you/" & jb 12:00p.m. "nohup ./" & jb 1min "echo stop!" & SEE ALSO parsedate(3) strftime(3)

sends your internal IP by email
This is useful if you have need to do port forwarding and your router doesn't assign static IPs, you can add it to a script in a cron job that checks if you IP as recently changed or with a trigger script. This was tested on Mac OSX.

check remote port without telnet

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