unix

问题 I have a dictionary with words separated by line breaks. 回答1: You can just do: egrep -x '.{1,3}' myfile This will also skip blank lines, which are technically not words. Unfortunately, the above reg-ex will count apostrophes in contractions as letters as well as hyphens in hyphenated compound words. Hyphenated compound words are not a problem at such a low letter count, but I am not sure whether or not you want to count apostrophes in contractions, which are possible (e.g., I'm). You can try

问题 Due to the modules my node program uses, it requires root to run. This is because it has to run a HTTP server on port 80 (and as you know, lower ports like that require root in order to be used). But, this program also uses a fs method to create a file. I don't mind if root is the owner as long as I can change the permissions... But that's exactly where I'm hitting the bump. I'm using the fs.mkdir function to create a directory like so: (Lets say this file is named create.js ) fs.mkdir(_

问题 Due to the modules my node program uses, it requires root to run. This is because it has to run a HTTP server on port 80 (and as you know, lower ports like that require root in order to be used). But, this program also uses a fs method to create a file. I don't mind if root is the owner as long as I can change the permissions... But that's exactly where I'm hitting the bump. I'm using the fs.mkdir function to create a directory like so: (Lets say this file is named create.js ) fs.mkdir(_

问题 Due to the modules my node program uses, it requires root to run. This is because it has to run a HTTP server on port 80 (and as you know, lower ports like that require root in order to be used). But, this program also uses a fs method to create a file. I don't mind if root is the owner as long as I can change the permissions... But that's exactly where I'm hitting the bump. I'm using the fs.mkdir function to create a directory like so: (Lets say this file is named create.js ) fs.mkdir(_

问题 I tried searching the web, but I must note that finding materials about this aspect of X programming is not really easy. I use X with GLX to create OpenGL contexts. I already know my current graphics card driver only supports up to OpenGL API version 3.3, but I want my application to be able to try to create a context with any kind of version (as it could run on other computers). My code goes like this : Version <- requested OpenGL Version (by example : 3.3) Create a context : if Version is 3

问题 I tried searching the web, but I must note that finding materials about this aspect of X programming is not really easy. I use X with GLX to create OpenGL contexts. I already know my current graphics card driver only supports up to OpenGL API version 3.3, but I want my application to be able to try to create a context with any kind of version (as it could run on other computers). My code goes like this : Version <- requested OpenGL Version (by example : 3.3) Create a context : if Version is 3

问题 I have a bunch of files in a directory all named YYYY_MM_DD -rw-r--r-- 1 root root 480K Apr 21 13:17 2012_04_05 -rw-r--r-- 1 root root 483K Apr 21 13:17 2012_04_06 -rw-r--r-- 1 root root 484K Apr 21 13:17 2012_04_07 -rw-r--r-- 1 root root 480K Apr 21 13:17 2012_04_08 -rw-r--r-- 1 root root 344K Apr 21 13:17 2012_04_09 -rw-r--r-- 1 root root 66K Apr 21 13:17 2012_04_10 -rw-r--r-- 1 root root 461K Apr 21 13:17 2012_04_11 -rw-r--r-- 1 root root 475K Apr 21 15:09 2012_04_17 -rw-r--r-- 1 root root

问题 I have a bunch of files in a directory all named YYYY_MM_DD -rw-r--r-- 1 root root 480K Apr 21 13:17 2012_04_05 -rw-r--r-- 1 root root 483K Apr 21 13:17 2012_04_06 -rw-r--r-- 1 root root 484K Apr 21 13:17 2012_04_07 -rw-r--r-- 1 root root 480K Apr 21 13:17 2012_04_08 -rw-r--r-- 1 root root 344K Apr 21 13:17 2012_04_09 -rw-r--r-- 1 root root 66K Apr 21 13:17 2012_04_10 -rw-r--r-- 1 root root 461K Apr 21 13:17 2012_04_11 -rw-r--r-- 1 root root 475K Apr 21 15:09 2012_04_17 -rw-r--r-- 1 root root

问题 I'm trying to do some searching on google (looped for every 5 min or so). When it gets a hit I want it to push the results to a syslog server. I'm very new to python so please forgive the ignorance, I have searched for ages and can't find an answer to my question. I intend to add multiple queries looking for diffirent results depending on the query results the logevent differs. WARN "possible hit" CRITICAL "definatly a hit" etc I would like the output to be for example like: log type, url,

问题 Say I have this file. $ cat a.txt c 1002 4 f 1001 1 d 1003 1 a 1001 3 e 1004 2 b 1001 2 I want to sort it by the second column and then by the third column. Column two are numbers, while column 3 can be treated as string. I know the following command works well. $ sort -k2,2n -k3,3 a.txt f 1001 1 b 1001 2 a 1001 3 c 1002 4 d 1003 1 e 1004 2 However, I think sort -k2n a.txt should also work, while it does not. $ sort -k2n a.txt a 1001 3 b 1001 2 f 1001 1 c 1002 4 d 1003 1 e 1004 2 Seems like