Tag Archives: ubuntu

Cross compile fstrim for Android on Ubuntu 18.10

Install compiler

$ sudo apt install gcc-arm-linux-gnueabi 

Get sources and compile

$ apt source util-linux
$ cd util-linux-*
$ ./autogen.sh
$ ./configure --host=arm-linux-gnueabi CFLAGS="-static"
$ make LDFLAGS="--static" fstrim
# OK with warnings

Check

$ file fstrim
fstrim: ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, for GNU/Linux 3.2.0, BuildID[sha1]=5f6d5789d8c27197fb5fadbc18f5cd506b330dc4, with debug_info, not stripped

Useful aptitude commands

A simple list of installed packages

max@wonko:~$ aptitude search '~i' -F '%p'

Search for installed packages from the testing repo

max@wonko:~$ aptitude versions '~i ~Atesting' --group-by=none

Finding why a package is installed

I found fonts-font-awesome in my headless server, but there’s a reason

max@wonko:~$ aptitude why fonts-font-awesome
i   owncloud Depends fonts-font-awesome

Select packages that were removed but not purged

max@wonko:~$ aptitude search '~c'

Search in the package description

max@wonko:~$ aptitude search '~d"web browser"'

Upgradable packages

max@wonko:~$ aptitude search '~U'

How to compile rsync for Android in Ubuntu

My situation

My machine

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 14.04 LTS
Release:    14.04
Codename:   trusty

The latest rsync version to compile (for me it was rsync-3.1.0.tar.gz)

$ curl -s http://rsync.samba.org/ftp/rsync/ \
    | sed -r 's/^.*href="([^"]*)".*$/\1/' | grep 'rsync-[0-9].*\.tar\.gz$'

Procedure

  1. save the tarball name in a variable
    $ RSYNCTGZ="rsync-3.1.0.tar.gz"
    
  2. install needed software
    $ sudo aptitude install gcc-arm-linux-gnueabi
    
  3. download sources
    $ wget http://rsync.samba.org/ftp/rsync/$RSYNCTGZ
    $ tar xzf $RSYNCTGZ
    $ cd rsync-[0-9]*
    
  4. compile
    $ ./configure --host=arm-linux-gnueabi CFLAGS=-static
    $ make
    
  5. install on the device
    $ adb push rsync /data/local/tmp && adb shell chmod 775 /data/local/tmp/rsync
    
  6. test execution
    $ adb shell /data/local/tmp/rsync
    

References