Pseudo-terminal will not be allocated because stdin is not a terminal
Try ssh -t -t(or ssh -tt for short) to force pseudo-tty allocation even if stdin isn’t a terminal. See also: Terminating SSH session executed by bash script From ssh manpage:
linux
Need a good hex editor for Linux
Bless is a high quality, full featured hex editor. It is written in mono/Gtk# and its primary platform is GNU/Linux. However it should be able to run without problems on every platform that mono and Gtk# run. Bless currently provides the following features: Efficient editing of large data files and block devices. Multilevel undo – redo … Read more
Docker can’t connect to docker daemon
After I update my Docker version to 0.8.0, I get an error message while entering sudo docker version: And I’ve followed the instructions and entered command sudo docker -d, and I got this: How do I solve the problem?
ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
Recently I came across the same issue. I was able to ssh to my pi on my network, but not from outside my home network. I had already: installed and tested ssh on my home network. Set a static IP for my pi. Set up a Dynamic DNS service and installed the software on my … Read more
How does “cat << EOF" work in bash?
This is called heredoc format to provide a string into stdin. See https://en.wikipedia.org/wiki/Here_document#Unix_shells for more details. From man bash: Here Documents This type of redirection instructs the shell to read input from the current source until a line containing only word (with no trailing blanks) is seen. All of the lines read up to that point are then used as the … Read more
Building HelloWorld C++ Program in Linux with ncurses
I successfully ran sudo apt-get install libncurses5-dev Within my Eclipse window I then try to build the following HelloWord.cpp program: I get the following error: It looks like the compiler is searching for the ncurses library and can’t find it? I checked /usr/lib and the library does not exist there so do I need to manually link the ncurses library … Read more
Meaning of exit status 1 returned by linux command
What is meaning of exit status 1 returned by linux command? Like 127 exit status indicates “command not found”. I have visited http://linux.die.net/abs-guide/exitcodes.html page, does it mean exit status 1 does not have particular special meaning?
Explaining the ‘find -mtime’ command
The POSIX specification for find says: -mtimen The primary shall evaluate as true if the file modification time subtracted from the initialization time, divided by 86400 (with any remainder discarded), is n. Interestingly, the description of find does not further specify ‘initialization time’. It is probably, though, the time when find is initialized (run). In the descriptions, wherever n is used as a primary argument, … Read more
Difference between using “chmod a+x” and “chmod 755”
chmod a+x modifies the argument’s mode while chmod 755 sets it. Try both variants on something that has full or no permissions and you will notice the difference.
How to change permissions for a folder and its subfolders/files in one step
The other answers are correct, in that chmod -R 755 will set these permissions to all files and subfolders in the tree. But why on earth would you want to? It might make sense for the directories, but why set the execute bit on all the files? I suspect what you really want to do is set the … Read more