On 03/13/2018 01:44 PM, Stephen Morris wrote: > On 14/3/18 7:19 am, Stephen Morris wrote: >> On 13/3/18 9:05 am, Ed Greshko wrote: >>> On 03/13/18 05:47, Ed Greshko wrote: >>>> On 03/13/18 05:20, Stephen Morris wrote: >>>>> Thanks Ed, I'll check the doco out, I was just expecting the >>>>> command to do exactly >>>>> what the help info said, output the information for all files, not >>>>> just a subset. >>>> It *does* do exactly what the man page says. You just have to >>>> understand the >>>> "context" in which it is saying it. >>>> >>>> Let me complete my thought. Even take the "ls" command as an example. >>>> >>>> [egreshko@meimei test-dir]$ ls >>>> test test1 test2 >>>> >>>> [egreshko@meimei test-dir]$ ls -a >>>> . .. test test1 test2 .test3 .test4 .test5 >>>> >>>> [egreshko@meimei test-dir]$ ls * >>>> test test1 test2 >>>> >>>> [egreshko@meimei test-dir]$ shopt -s dotglob >>>> >>>> [egreshko@meimei test-dir]$ ls * >>>> test test1 test2 .test3 .test4 .test5 >>>> >>> Oh, when it comes to ls, I've been gently reminded about -A >>> >>> [egreshko@meimei test-dir]$ ls -A >>> test test1 test2 .test3 .test4 .test5 >> >> Thanks Ed, I knew about the differences between the -a and -A on ls, >> and having had a look at the --help for ls and du again, I can see the >> subtle difference between the -a parameters on both commands. It just >> seems counter intuitive to me to have to issue another command (even >> if one knows of its existence) to get a command to function "properly". > > I'm now completely confused. The command du -abh /home/steve/workspace > is now displaying the information directories beginning with a '.' and > at least some files beginning with a '.' without having issued the shopt > command. Because you didn't include a shell glob. You told du specifically: "show me the disk usage of /home/steve/workspace". du then walks down THAT directory tree and du does NOT ignore files starting with a dot. The difference is: before you used "*" which made the shell expand the glob (glob meaning "*") and pass a list of files to du to check, but the important bit is that the _shell_ created the list of files and, by default, the shell does NOT list files starting with a dot. Does that clarify it a bit? ---------------------------------------------------------------------- - Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx - - AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 - - - - Memory is the second thing to go, but I can't remember the first! - ---------------------------------------------------------------------- _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx
