Shell

select a column
I've a file like this: andrea andre(a)lol.com antonio(a)lol.com marco 45247(a)pop.com kk(a)pop.com pollo(a)lol.com mary mary(a)lol.com can I select only the column with email adress? can I utilise a filter with @ ? Alfredo ... 19 Jun 2008 01:20

Dr. Evil typed sleep 666; rm -rf /
Regarding how to defuse $ sleep 666; echo BOOM given only one terminal, m> Here, running bash in a xterm, this works for me: m> ^S ^C ^C ^Q For me in xterm, or even on the Debian sid tty1 console with no dotfiles to be read at login, just ^S ^C already gives $ sleep 666; echo BOOM ^C BOOM BM> In most shel... 28 Jun 2008 06:34

Crontab: Do something exactly every 3 week on Tuesday?
How do I specify in a crontab/cronfile that a certain command should be done exactly every 3 week (on Tuesday) ? * * */21 * 2 command is not what I want because the command is perfomed on every 21st of each month read. approx. every 4 weeks. How else can I achieve this? Wolfgang ... 19 Jun 2008 01:20

Bash-script produces "Interrupted system call"-print outs
PREAMBLE: Hello, I have come across a bash-related problem I cannot seem to solve. I've tried every resource I've come to think of (IRC and GNU mailing list) but was in the end recommended this newsgroup. I hope my article follows the USENET etiquette since this is my first time using the service. REAL CONTE... 19 Jun 2008 01:20

Removing comments from xml with gawk
In processing xml files with comments, I have been piping them through this function, before I do my processing. This is to remove the comments, before I process. xml-decomment () { gawk ' BEGIN { RS = "<!--"; FS = "-->"; ORS=""; OFS="" } { if ( NR > 1 ) $1=""; print } ' } Using ... 19 Jun 2008 01:20

When do I need `expr ......` and when not? $(($aaa - $bbb))simplyfiable?
2008-06-15, 06:48(+00), Wolfgang Meister: As I learned it is not always necessary to use `expr ....` (with backticks) to calculate mathematical expressions. When I do for example the following firstsec=345 secondsec=723 diffsec=$((secondsec - firstsec)) echo diff=$diffsec then it works altho... 19 Jun 2008 01:20

When do I need `expr ......` and when not? $(($aaa - $bbb)) simplyfiable?
As I learned it is not always necessary to use `expr ....` (with backticks) to calculate mathematical expressions. When I do for example the following firstsec=345 secondsec=723 diffsec=$((secondsec - firstsec)) echo diff=$diffsec then it works although I did not used "expr" for calculate the difference. ... 12 Jul 2008 15:37

Olympialaisia ter�v�n�
*Koska olemme varsin pitk��n tienneet, ett� MY�S Marssissa on ollut ja on yh� valtaisat vesivarannot, siihen liittyv�t mekaniikat tietysti meit� my�s jatkossa kiinnostavat. T�ss� aiheesta lis��: Marsin pinnalla joskus lainehtinut vesi oli niin pikisuolaista, ett� ainakaan Maan pinnalla esiintyv�t el�m�nmuodot eiv... 19 Jun 2008 01:20

zsh shell string question
In article <c820d5c3-6875-4ca0-825a-c93b96481b0f(a)z16g2000prn.googlegroups.com>, Chad <cdalten(a)gmail.com> wrote: On Jun 13, 8:12�pm, Barry Margolin <bar...(a)alum.mit.edu> wrote: In article <91c0237b-9c76-47ca-ba83-0d7d391fd...(a)s21g2000prm.googlegroups.com>, �Chad <cdal...@... 19 Jun 2008 01:20

Execute second command only if first fails/succeeds?
2008-06-14, 08:28(+00), Matthew Lincoln: I am not sure about on how to specify that a second command should only be execute in case that the first commnd fails/succeeds. When I enter: cmd1 | gzip -f ... && cmd2 Is then cmd2 executed only if cmd1 is finished successfully or if gzip is finished su... 19 Jun 2008 01:20