What is the portable (POSIX) way to achieve process substitution?
Some shells, like bash, support Process Substitution which is a way to present process output as a file, like this:
Unix & Linux
Why is there a * When There is Mention of Unix Throughout the Internet?
I’ve noticed that throughout the Internet, within forums and blog posts, Unix always has a * in the word, whether it is *nix or Un*x, as I noticed at the welcoming banner at the Unix StackExchange site.
What do the “buff/cache” and “avail mem” fields in top mean?
Within the output of top, there are two fields, marked “buff/cache” and “avail Mem” in the memory and swap usage lines:
Comparing two strings in Bash
I have the following if block in my bash script:
Documentation on LESS_TERMCAP_* variables?
I see these pretty colors in manpages viewed with less when setting a bunch of these variables. What do they mean, where is the documentation? Is this interpreted by less or termcap?
debian su – and su $PATH differences?
The two implementations are very similar but have some minor differences (and there might be more that was not yet noticed ofcourse), e.g.
Is there any UNIX variant on which a child process dies with its parent?
I have been studying the Linux kernel behaviour for quite some time now, and it’s always been clear to me that:
How does ping work on Fedora without setuid and capabilities?
As far as I know, ping needs to create a raw socket (which needs either root access or cap_net_raw capabilities).
Can files be created with permissions set on the command line?
When creating directories, mkdir -m <mode> <dir> provides for creating one or more directories with the given mode/permissions set (atomically).
Is it possible to install a linux desktop environment from a live cd?
My question is about Linux in general but lets suppose my ubuntu isn’t working property, booting in tty or whatever. I have no internet connection but I have ubuntu live cd. Is it possible to reinstall the desktop environment from live cd?