964 reputation
59
bio website
location
age
visits member for 3 years
seen 12 hours ago

Sep
12
comment Open a directory and let it update itself using “tail -f”
rreverse sort, t sort by time; the result is that newest files are at bottom thus kept by tail.
Sep
10
comment Why does [a-z] asterisk match numbers?
Ok, what I missed was that the range was interpreted according to the current collation sequence.
Sep
10
comment Why does [a-z] asterisk match numbers?
Could you give an example of [a-z] matching more that the 26 letters matched in the C locale? What I remember from when I last looked at this, all encodings practically used in Unix variants had ISO-646 as a base (then the upper 128 codes where used differently, directly for characters in encodings like the ISO-8859-X, combined in encodings like UTF-8 or the EUC family). Even AIX hadn't EBCDIC locales (at least as available to me). I remember trying to find if POSIX/UNIX standards demanded it, but I don't remember the result.
Oct
9
comment Which programme calls csh.cshrc?
IIRC they are read even if the user has a version.
Sep
25
comment Use the system Compose database in Gtk applications
@Gilles, my guess is that the first is for GTK application to use X input method, the second is there to override some desktop settings trying to force every application to behave its way.
Aug
19
comment Cursor keys in bash in dtterm don't work as expected
Most probably not. I've not used it for years (and it seems to me that it was already EOLived then), but I don't remember that DtTerm was as much customizable. Although I think it used the XRessource mechanism, I doubt it used the same widget as XTerm.
Jul
31
comment gmrun stopped searching user added path
@Gilles, one potential source is the bash info manual ;-). At least in edition 3.2, that is given as an alternative way to testing $-. I don't remember why I ended up preferring it to testing $- (I traced back my use to 1999 which is the earlier revision I've not lost)
Jul
30
comment gmrun stopped searching user added path
@CravingSpirit, I do it only if the shell is interactive (PS1 set) as what I've in my .bashrc make sense only for interactive shells (so there is no environment variable definition in my .bashrc, in my experience those who set environment variables definition in their .bashrc are better served by setting the option which make launch shells from their terminal emulator as login shells).
Jul
4
comment Where is the Ctrl+/ (^/) bash shortcut for undo defined?
That or its configuration files (XTerm configuration is able to handle translation of X keypresses to strings -- but I don't see any in the appdefault installed here).
May
15
comment POSIX head and tail not feature equivalent
@StephaneChazelas, GNU head -n -1 needs also one line of storage (or two depending what you are really counting). And doesn't fail here.
Apr
16
comment End of lines problem in emacs when editing markdown texts via It's All Text
I'm far from sure it is an emacs problem and not an "It's All Text" one. Do you reproduce with a simple text file? If yes, does customizing require-final-newline solve your problem?
Apr
3
comment Why doesn't tar ask before overwriting existing files?
@mattdm, git handles trees, RCS handles files. For config files, this an advantage of RCS (in most contexts, it is a source of problems).
Mar
26
comment What is the concept of Drives in Unix Systems?
I'm far from convinced that there is a relationship between fixed disks and the notion of mounting. The notion of a single hierarchical name space is quite unique to Unix and its descendant (and perhaps Multics which ISTR introduced the directory hierarchy, I don't know if it was unique). Other OSes I know (TOPS-10, TOPS-20, VMS) use structured names with a device designator, even when they have a notion of directory hierarchy. And Unix uses names in the directory hierarchy to refer to mountable devices (tapes and mountable hard disks).
Mar
8
comment Is there a way to download pure Unix?
@tonymarschall, I'd not recommend linux from scratch to someone not yet familiar with Unix.
Mar
8
comment Is there a way to download pure Unix?
@JamesLitewski. you got the things in the reverse order. Undex Unix, the GUI is mostly an application layer which run over the OS. Any variant will easily provide you with a command line interface and just that (with the potential exception of MacOS about which I know very little).
Mar
8
comment Is there a way to download pure Unix?
Well, that's a simplified version of the history. See levenez.com/unix for a more complete one.
Jan
9
comment Is an SSH connection faster if I lower the RSA key size?
The problem with X is that it is a protocol which doesn't support very well high latency -- and applications are even worse that needed by the protocol in such context. You may want to use an X protocol compressors (I've never done that, I remember seeing some). Or switch to something like VNC.
Dec
31
comment What languages are used to build Unix commands?
Note also that some commands such as cd must be a shell builtin to work effectively.
Dec
19
comment How to avoid a useless use of cat when parsing a file?
@ddeimeke, because I didn't remember if it is POSIX or just a common extension. Now I've checked and it is in SUSv2.
Dec
19
comment How to install LuaJIT on FreeBSD without using Gmake?
Why do you constraint yourself to not using gmake? I understand the developers who want more portability than just to gmake, but not a user who don't accept to use prerequisites of the developers. Would you ask the same question for ant or bjam or a 3rd party library?