Tag Archives: Linux

The Unix Hierarchy


* insecure with the concept of a terminal
* has yet to learn the basics of vi
* has not figured out how to get a directory
* still has trouble with typing after each line of input


* knows that `ls’ will produce a directory
* uses the editor, but calls it `vye’
* has heard of `C’ but never used it
* has had his first bad experience with rm
* is wondering how to read his mail
* is wondering why the person next to him seems to like Unix so very much.


* uses vi and nroff, but inexpertly
* has heard of regular-expr.s but never seen one.
* has figured out that `-‘ precedes options
* has attempted to write a C program and has decided to stick with pascal
* is wondering how to move a directory
* thinks that dbx is a brand of stereo component
* knows how to read his mail and is wondering how to read the news

Knowledgable user

* uses nroff with no trouble, and is beginning to learn tbl and eqn
* uses grep to search for fixed strings
* has figured out that mv(1) will move directories
* has learned that “learn” doesn’t help
* somebody has shown him how to write C programs
* once used sed to do some text substitution
* has seen dbx used but does not use it himself
* thinks that make is a only for wimps


* uses sed when necessary
* uses macro’s in vi, uses ex when neccesary
* posts news at every possible opportunity
* write csh scripts occasionally
* write C programs using vi and compiles with cc
* has figured out what `&&’ and ‘||’ are for
* thinks that human history started with ‘!h’


* uses sed and awk with comfort
* uses undocumented features of vi
* write C code with `cat >’ and compiles with ‘!cc’
* uses adb because he doesn’t trust source debuggers
* can answer questions about the user environment
* writes his own nroff macros to supplement std. ones
* write scripts for Bourne shell (/bin/sh)
* knows how to install bug fixes


* uses m4 and lex with comfort
* writes assembly code with `cat >’
* uses adb on the kernel while system is loaded
* customizes utilities by patching the source
* reads device driver source with his breakfast
* can answer any unix question after a little thought
* uses make for anything that requires two or more distinct commands to achieve
* has learned how to breach security but no longer needs to try


* writes device drivers with `cat >’
* fixes bugs by patching the binaries
* can answer any question before you ask
* writes his own troff macro packages
* is on first-name basis with Dennis, Bill, and Ken

Ubuntu Linux – Monitorizarea sistemelor remote cu Saidar

Saidar este o unealta utila pentru monitorizarea sistemelor remote, prin SSH. Saidar monitorizeaza incarcarea procesorului, incarcarea memoriei, numarul de procese active, gradul de utilizare al interfetelor de retea, etc.
Pe Ubuntu Hardy saidar se instaleaza extrem de usor, daca aveti Universe activat in repositories, folosind :

sudo apt-get install saidar

Ca sa il rulati (obtinand un rezultat similar cu cel de mai jos) tastati :

saidar -c