|Invert matching lines, NUL-separated|
I’m writing something that deals with file matches, and I need an
inversion operation. I have a list of files (e.g. from
find . -type f
-print0 | sort -z >lst), and a list of matches (e.g. from
grep -z foo lst >matches), and now I want to invert this
Background: I’m sorta implementing something like
|Using bind to read the current command line|
bind -x to execute a script whenever a certain
key sequence is pressed.
For example I have a script at
/usr/local/bin/foo with the
If I run
bind -x '" ": /usr/local/bin/foo' then every time
I press the space bar twice it echos "foo". So far so good.
What I want to
|Concatenate contents from stdout and from file|
How can we concatenate results from stdout (or stderr) and a file into a
ls -a | grep text1
file2.txt into a final result (not
file2.txt), without storing
grep text1 to
something intermediate such as
grep text1 > file1.txt
|Changing local from en_US.utf8 to en_US in RHEL 7|
I'm installing "Red Hat Enterprise Linux 7.2 (Linux version
3.10.0-327.el7.x86_64 (email@example.com) (gcc
version 4.8.3 20140911 (Red Hat 4.8.3-9) (GCC) ) #1 SMP Thu Oct 29 17:29:29
I am trying to switch from
LANG="en_US" as we need to operate the OS in 8 bits ASCII
I have tried to change
|DE with maximally customized content|
I want a (heavily) customized DE, not so much in its style as content
aspects. I want a DE w/ minimal default content but full DE functionality,
i.e. windows, desktop, icons, menu, application (launcher) panel and system
tray. As is known, most distros may break if you remove some of their
default applications; for the same reason, you shouldn't mix applications
of different DEs. So the questio
|dnf: additionaly install optional packages to already installed group?|
I installed Group "XYZ" without optional packages.
How do I install the group with optional packages, without removing and
|How do you open Wireshark's Legacy (GTK) By Default?|
I've recently updated Wireshark on OSX El Capitan from 1.12.0 to 2.0.0.
The newer stable release uses the Qt interface instead of the old X11 but
the new UI is a lot buggy for me and I want the old interface without
downgrading. The release notes state that I have to install wireshark
through Homebrew for GTK.
I've already brew install wireshark with gtk+3 support
|question on sed command|
so the command is :
echo "abc 123" | sed "s/[0-9]*/h/g"
and im getting output as
how am i getting this output?
the output i expected it to be is abc h
which im getting by this command :
echo "abc 123" | sed "s/[0-9][0-9]*/h/g"
can someone explain this.. <
|switching to ramdisk root|
My application is to do a secure erase on my system disk (an SSD) using
from a shell script. So my thoughts were:
- create a ramdisk
- copy the linux OS to the ramdisk
- unmount the original system drive
- do a secure erase
I created the ramdisk and mounted it, but when I do a pivot_root, it
can't find any of the applications. I copied all
|Getting rid of strange environment variable|
Using Cygwin, I installed Environment Modules. Every time I run a module
command, I get
init.c(718):WARN:165: Cannot set TCL variable '!::'
I've traced this down to the fact that Cygwin has the following
environment variable set:
$ env | grep ::
Does anyone know what this is, where it is set, why it might be necessar