I’ve just installed CentOS7 as a virtual machine on my mac (osx10.9.3 + virtualbox) .Running ifconfig returns command not found. Also running sudo /sbin/ifconfig returns commmand not found. I am root. The output of
echo $PATH is as below.
I have compared the man pages of dir and ls and they seem to be exactly the same. Both are part of GNU coreutils and “list directory contents”.
What does <<< mean? Here is an example: $ sed 's/a/b/g' <<< "aaa" bbb Is it something general that works with more Linux commands? It…
Today I was using glance tool in my office to monitor CPU utilization.When I run glance from terminal ,the command clears the screen and after all the work when I quit back to the terminal,the previous prompts are still there on my screen.I mean that I can see all the previous lines.My question is how is this effect of clearing screen achieved.If they had used command like clear,It should have cleared the whole screen,how did they manage to get back all the previous prompts ? I want to implement the same feature for some of my scripts.
I’ve read a lot about realpath command and how it has been deprecated with the readlink -f being now recommended. I have also seen in some places that the reason why realpath was introduced was for the lack of such functionality in readlink and that once it has been introduced, realpath was no longer needed and its support discontinued by most OS vendors.
I’m going through http://mywiki.wooledge.org/BashGuide/CommandsAndArguments and came across this:
So, when a command is not found, by what means is the “did you mean:” list populated?
What program finds these alternate commands?
What is the meaning of: “(main), (universe)…”?
Can I change which program finds these?
When using ss with -p option, user/pid/fd column jumps underneath the particular line. For instance this is it what I’m actually seeing:
If I execute the test command in bash, test(evaluates conditional expression) built-in utility is started: