Commands tagged Debian (100)

  • Check tcp-wrapping support

    This function returns TRUE if the application supports tcp-wrapping or FALSE if not by reading the shared libraries used by this application. Show Sample Output


    1
    supportsWrap(){ ldd `which ${1}` | grep "libwrap" &>/dev/null && return 0 || return 1; }
    cicatriz · 2010-12-01 15:22:29 15
  • Check if a package is installed. If it is, the version number will be shown.

    If the first two letters are "ii", then the package is installed. You can also use wildcards. For example, . dpkg -l openoffice* . Note that dpkg will usually not report packages which are available but uninstalled. If you want to see both which versions are installed and which versions are available, use this command instead: . apt-cache policy python Show Sample Output


    1
    dpkg -l python
    hackerb9 · 2011-01-05 06:15:13 5
  • apt-get upgrade with bandwidth limit

    Trickle is here: http://monkey.org/~marius/pages/?page=trickle Trickle is a simple bandwidth limiter


    1
    trickle sudo apt-get update -y
    mrman · 2011-02-15 02:05:37 3
  • locating packages held back, such as with "aptitude hold <package>"

    locating packages held back, such as with "aptitude hold "


    1
    aptitude search ~ahold
    pykler · 2012-04-29 15:02:32 4
  • List your largest installed packages (on Debian/Ubuntu)

    The other commands were good, but they included packages that were installed and then removed. This command only shows packages that are currently installed, sorts smallest to largest, and formats the sizes to be human readable. Show Sample Output


    1
    dpkg-query --show --showformat='${Package;-50}\t${Installed-Size}\n' `aptitude --display-format '%p' search '?installed!?automatic'` | sort -k 2 -n | grep -v deinstall | awk '{printf "%.3f MB \t %s\n", $2/(1024), $1}'
    EvilDennisR · 2013-07-26 23:18:20 13
  • print the name of each package APT knows [matching a prefix]

    In this case, linux- is the prefix; simply running apt-cache pkgnames would list every package APT knows about. The default APT config assumes -g, --generate; to use the cache as/is, you could similarly run: apt-cache --no-generate pkgnames [prefix] Adding --all-names, like so: apt-cache --no-generate --all-names pkgnames [prefix] would print all the packages APT knows about, using the cache as/is, including virtual packages and missing dependencies. This command was shamelessly stolen from the apt-cache(8) man-page. Show Sample Output


    1
    apt-cache pkgnames linux-
    benjabean1 · 2014-12-14 06:48:57 8
  • Marks all manually installed deb packages as automatically installed.

    An alternative without aptitude.


    1
    apt-mark showmanual|xargs sudo apt-mark markauto
    DellDor · 2015-08-10 02:35:22 12
  • Remove specific versions of old kernels (Ubuntu/Debian)

    If, for example, you want to remove all kernels and headers but the last three versions, you can't use one of that magic all-in-one "remove old stuff" commands. With this simple but elegant command you can remove a range of versions, or a list of versions with e.g. {14,16,20}. Show Sample Output


    1
    apt purge linux*{14..18}*
    ppq · 2016-04-20 07:44:55 11
  • Find name of package which installed a given shell command

    Some command names are very different from the name of the package that installed them. Sometimes, you may want to find out the name of the package that provided a command on a system, so that you can install it on another system. Show Sample Output


    1
    dpkg -S "$(readlink -e $(which w))" | cut -d ':' -f 1
    Fox · 2016-05-18 09:41:29 11
  • get a rough estimate about how much disk space is used by all the currently installed debian packages

    The vaule is expressed in megabytes Show Sample Output


    1
    echo $[ ($(dpkg-query -s $(dpkg --get-selections | grep -oP '^.*(?=\binstall)') | grep -oP '(?<=Installed-Size: )\d+' | tr '\n' '+' | sed 's/+$//')) / 1024 ]
    acavagni · 2019-06-02 16:35:34 55
  • find packages installed from e.g. sid which are newer than those available from e.g. testing when sid is no longer present as a source repo

    This is useful if you add sid, install some packages, then remove sid and want to work out which packages you installed from sid that should be removed (e.g. before an upgrade to the new stable). Alternatively you can think of this as "find installed packages that can no longer be installed."


    1
    aptitude search -F '%p %v %V %O' '?narrow(?not(?archive("^[^n][^o].*$")),?version(CURRENT))' | while IFS=' ' read -r pkg ver candidate origin; do if [[ $ver == "$candidate" ]] && [[ $origin == '(installed locally)' ]]; then echo "$pkg"; fi; done
    sorpigal · 2021-12-26 15:57:15 303
  • find files in $PATH that were not installed through dpkg

    OS: Debian based (or those that use dpkg) Equivalent to doing a dpkg -S on each file in $PATH, but way faster. May report files generated though postinstall scripts and such. For example . It will report /usr/bin/vim .. which is not not a file installed directly by dpkg, but a link generated by alternatives hooks


    0
    echo -e "${PATH//://\n}" >/tmp/allpath; grep -Fh -f /tmp/allpath /var/lib/dpkg/info/*.list|grep -vxh -f /tmp/allpath >/tmp/installedinpath ; find ${PATH//:/ } |grep -Fxv -f /tmp/installedinpath
    kamathln · 2009-09-09 05:33:14 4
  • List your largest installed packages (on Debian/Ubuntu)

    List packages and their disk usage in decreasing order. This uses the "Installed-Size" from the package metadata. It may differ from the actual used space, because e.g. data files (think of databases) or log files may take additional space. Show Sample Output


    0
    perl -ne '$pkg=$1 if m/^Package: (.*)/; print "$1\t$pkg\n" if m/^Installed-Size: (.*)/;' < /var/lib/dpkg/status | sort -rn | less
    hfs · 2009-10-19 12:55:59 7
  • Show a Package Version on Debian based distribution


    0
    dpkg-query -W -f='${Version}' package-name
    ohe · 2010-06-02 14:39:08 3
  • Show a Package Version on Debian based distribution

    Supports regex pattern and very flexible output parameters and search options. Show Sample Output


    0
    aptitude -F '%p %v#' search <pattern>
    unixmonkey10157 · 2010-06-03 15:37:27 3
  • A better 'apt-cache' using Xapian to rank results

    A replacement for 'apt-cache' that uses a Xapian to produce ranked results. Available in 'apt-xapian-index' 0.27 and higher. Show Sample Output


    0
    axi-cache search <searchterm>
    tarkasteve · 2010-07-05 00:16:03 3
  • Purge configuration files of removed packages on debian based systems

    Lists all packages in "rc" state and purge them one at a time.


    0
    dpkg -l | grep ^rc | cut -d' ' -f3 | xargs dpkg -P
    cyrusza · 2010-11-22 12:53:31 6
  • Save the debconf configuration of an installed package


    0
    debconf-copydb configdb copydb --pattern=<PACKAGE> --config="Name: copydb" --config="Driver: File" --config="Filename: ~/copydebconf.dat"
    ohe · 2011-08-29 14:00:42 3
  • Import a debconf configuration (from a copydebconf.dat file)


    0
    debconf-copydb copydb configdb --config="Name: copydb" --config ="Driver: File" --config="Filename: ~/copydebconf.dat"
    ohe · 2011-08-29 14:01:31 3
  • Remove all unused kernels with apt-get

    since awk was already there one can use it instead of the 2 greps. might not be faster, but fast enough


    0
    apt-get remove $(dpkg -l | awk "/^ii linux-(image|headers)/ && ! /`uname -r`/ {print \$2}")
    _john · 2011-10-09 13:58:47 4
  • Install 4 new package files

    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....


    0
    sudo dpkg -i `ls -tr *.deb | tail -n4`
    _john · 2011-10-09 14:20:11 3
  • Generate a list of installed packages on Debian-based systems

    This will print the name of every installed package on a Debian system.


    0
    aptitude search ~i -F %p
    dbbolton · 2011-10-15 00:31:10 8
  • Seach for packages on Debian using regex.

    # Search for an available package on Debian systems using a regex so it only matches packages starting with 'tin'.


    0
    aptitude search ^tin
    defiantredpill · 2011-10-20 17:51:36 3
  • Marks all manually installed deb packages as automatically installed.

    Marks all manually installed deb packages as automatically installed. Usefull to combine with apt-get install <all manually packages that we want> to have a clean installed debian-based system.


    0
    aptitude -F "%p" search \!~M~i~T | xargs apt-mark markauto
    gspadari · 2012-03-09 13:44:00 7
  • change default Web browser

    also use: update-alternatives --config gnome-www-browser


    0
    update-alternatives --config x-www-browser
    gwd · 2012-07-08 20:27:42 4
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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"

HTTP GET request on wireshark remotly

cycle through everything sox knows how to read, playing only the first three seconds
I wasted two hours reading the sox documentation and searching on the web for the format of some obscure fscking sound sample, and then finally came up with this. This plays only the first three seconds of your unknown formatted sound file using every one of sox's built-in filetypes. If you don't get an exact match, you may get close. . I could not fit every single type in and keep it under 127 characters, so you will have to replace "..." with the full list obtainable by `$ sox --help` (or try `Show sample output`) . note: /usr/bin/play should be linked to sox on most systems.

kill all foo process
Kill all processes with foo in them. Similar to pkill but more complete and also works when there is no pkill command. Works on almost every Linux/Unix platform I have tried.

List out classes in of all htmls in directory
Lists out all classes used in all *.html files in the currect directory. usefull for checking if you have left out any style definitions, or accidentally given a different name than you intended. ( I have an ugly habit of accidentally substituting camelCase instead of using under_scores: i would name soemthing counterBox instead of counter_box) WARNING: assumes you give classnames in between double quotes, and that you apply only one class per element.

Remove the first character of each line in a file

Hide or show Desktop Icons on MacOS
Hides all Files and Folders on the MacOS Desktop. To show files and folders, type "true" instead of "false". "Finder" at the end is case sensitive, "finder" doesn’t work

generate random tone

Show crontabs for all users
This is flatcaps tweaked command to make it work on SLES 11.2

print crontab entries for all the users that actually have a crontab
This is how I list the crontab for all the users on a given system that actually have a crontab. You could wrap it with a function block and place it in your .profile or .bashrc for quick access. There's prolly a simpler way to do this. Discuss.

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