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
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
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
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?
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
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.
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
Error occurred due to folder permission, I was creating CSV from my application, which was required folder permission to be granted. After giving Full Control to the folder error got resolved.
From Linux From Scratch Chapter 6.8. Populating /dev 6.8.1. Creating Initial Device Nodes When the kernel boots the system, it requires the presence of a few device nodes, in particular the console and null devices. Create these by running the following commands: You should then continue with the steps in “6.8.2. Mounting tmpfs and Populating /dev”. … Read more
The reason this occurs is because bash actually expands the asterisk to every matching file, producing a very long command line. Try this: Warning: this is a recursive search and will find (and delete) files in subdirectories as well. Tack on -f to the rm command only if you are sure you don’t want confirmation. You can do … Read more