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can't install software--can I fix missing dpkg? up vote 0 down vote favorite New software can't be installed, because there is a problem with the software currently installed. Do you want to repair now? hit Repair Package operation failed The installation or removal of a software package failed. Details => installArchives()failed:Could not exec dpkg! Error in function (synaptic:12725): GLib-CRITICAL **: g_child_watch_add_full: assertion 'pid > 0' failed Could not exec dpkg! E: Sub-process /usr/bin/dpkg returned an error code (100) A package failed to install. Trying to recover: sh: 1: dpkg: not found apt software-center package-management dpkg share|improve this question edited May 30 '14 at 21:38 Florian Diesch 42.7k1296119 asked May 30 '14 at 21:18 Open a terminal and run sudo apt-get install -f, post the error message. – bodhi.zazen May 30 '14 at 21:29 Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following packages will be REMOVED: skype 0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 62.5 kB disk space will be freed. Do you want to continue? [Y/n] y Could not exec dpkg! E: Sub-process /usr/bin/dpkg returned an error code (100) tom@thomas:~$ – user125272 May 31 '14 at 0:00 Answer 1 Test this: Open a terminal, Press Ctrl+Alt+T Run it: sudo -i mkdir /tmp/dpkg cd /tmp/dpkg wget http://security.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.17.5ubuntu5.2_i386.deb or wget http://security.ubuntu.com/ubuntu/pool/main/d/dpkg/dpkg_1.17.5ubuntu5.2_amd64.deb ar x dpkg*.deb data.tar.gz tar xfvz data.tar.gz ./usr/bin/dpkg cp ./usr/bin/dpkg /usr/bin/ apt-get update apt-get install --reinstall dpkg share|improve this answer edited Nov 8 '14 at 0:38 answered May 30 '14 at 22:24 kyodake http://askubuntu.com/questions/474646/cant-install-software-can-i-fix-missing-dpkg