kernel.org has a public (read-only) git repository that you can clone. It has also tags for every kernel version, so you can checkout a specific version: # Clone the kernel to your local machine $ git clone git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git $ cd linux-stable # Find the tag for the version you want $ git tag -l | … Read more
First, let’s demonstrate that head is actually working correctly: $ printf ‘\xef\xbb\xbf’ >file $ head -c 3 file $ head -c 3 file | hexdump -C 00000000 ef bb bf |…| 00000003 Now, let’s create a working function has_bom. If your grep supports -P, then one option is: $ has_bom() { head -c3 “$1” | … Read more
You can install aspell with Homebrew on OS X. brew info aspell lists supported languages. brew install aspell –lang=en,fi,jp aspell check opens a file in an interactive spell checker: for f in *.txt; do aspell check $f; done aspell list prints all unrecognized words: cat *.txt | aspell list | sort -u Learned words are … Read more
Find the module in the sysfs tree. In this case it was in /sys/bus/usb-serial/drivers/cp2101 In this directory, there is a new_id file entry that can be used to dynamically add VID PID pair like this : echo VID PID >new_id Here is a LWN entry about this feature
A working solution per Jonas Ådahl a mutter developer: Usually what I do is switch to a VT and run: dbus-run-session — gnome-shell –display-server –wayland
The user’s chosen editor should be in $EDITOR, but you must still choose a sane default. “${EDITOR:-vi}” file.txt
There are several layers at which a disk error can be simulated. If you are testing a single user-space program, probably the simplest approach is to interpose the appropriate calls (e.g. write()) and have them sometimes return an error. The libfiu fault-injection library can do this using its fiu-run tool. Another approach is to use … Read more
Assuming you’ve already installed apache, do the following: sudo a2enmod userdir sudo service apache2 reload The first command enables the userdir apache mod, which does exactly what you want. The second reloads apache configurations so that it starts using the new configuration. To install apache2: sudo apt-get install apache2 Of course, you’ll also need to … Read more
KEYDEF is F[.C][OPTS][,F[.C][OPTS]] for start and stop position, where F is a field number and C a character position in the field; both are origin 1, and the stop position defaults to the line’s end. If neither -t nor -b is in effect, characters in a field are counted from the beginning of the preceding … Read more
This happens because grep interprets — as an option instead of a text to look for. Instead, use –: grep — “—” your_file This way, you tell grep that the rest is not a command line option. Other options: use grep -e (see Kent’s solution, as I added it when he had already posted it … Read more