commandline session $ 4.2.29 15 515—> scala Welcome to Scala version 2.9.2 (OpenJDK 64-Bit Server VM, Java 1.6.0_24). Type in expressions to have them evaluated. Type :help for more information. scala> 4*2-7 res0: Int = 1 scala> res0+1 res1: Int = 2 scala> 2*0.4 res2: Double = 0.8 scala> “hello” res3: java.lang.String = hello scala> …
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process tree using ps
commandline session $ 4.2.29 10 510—> ps -H PID TTY TIME CMD 4668 pts/1 00:00:00 bash 4669 pts/1 00:00:53 evince 4738 pts/1 00:00:00 ps $ 4.2.29 11 511—>
GNU readline + bind + functions + keybinding
commandline session $ 4.2.29 57 557—> bind -P abort can be found on “C-g”, “C-xC-g”, “eC-g”. accept-line can be found on “C-j”, “C-m”. alias-expand-line is not bound to any keys arrow-key-prefix is not bound to any keys backward-byte is not bound to any keys backward-char can be found on “C-b”, “eOD”, “e[D”. backward-delete-char can be …
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apache2 commandline 1
commandline session $ 4.2.29 34 534—> sudo /usr/sbin/apache2 -D module [sudo] password for jeffrin: apache2: bad user name ${APACHE_RUN_USER} $ 4.2.29 35 535—> sudo /usr/sbin/apache2 -D loadmodule apache2: bad user name ${APACHE_RUN_USER} $ 4.2.29 36 536—> sudo /usr/sbin/apache2 -l Compiled in modules: core.c mod_log_config.c mod_logio.c mod_version.c prefork.c http_core.c mod_so.c $ 4.2.29 37 537—>
xargs and find to selected copy
commandline session $ 4.2.29 8 508—> find . -name “*gimp*” -print0 | xargs -0 -I {} cp {} ../6raphics/ $ 4.2.29 9 509—> find . -name “*gimp*” -print0 | xargs -0 -I {} cp {} ../6raphics/ $ 4.2.29 10 510—> find . -name “*blender*” -print0 | xargs -0 -I {} cp {} ../6raphics/ $ 4.2.29 …
R – reading tabular data files
commandline session > dfrm print(dfrm dfrm > print(dfrm) V1 V2 1 Name Jeffrin 2 Age 35 3 Sex Male > dfrm print(dfrm) V1 1 Name-Jeffrin 2 Age-35 3 Sex-Male > dfrm print(dfrm) V1 1 Name-Jeffrin 2 Age-35 3 Sex-Male > class(dfrm$V1) [1] “factor” > class(dfrm$V1) [1] “factor” > class(dfrm$V2) [1] “NULL” > class(dfrm$V3) [1] “NULL” …
R – package installation
Get The Hang > install.packages(c(“Rpad”)) Installing package(s) into ‘/usr/local/lib/R/site-library’ (as ‘lib’ is unspecified) — Please select a CRAN mirror for use in this session — Loading Tcl/Tk interface … done trying URL ‘http://ftp.iitm.ac.in/cran/src/contrib/Rpad_1.3.0.tar.gz’ Content type ‘application/x-gzip’ length 1745840 bytes (1.7 Mb) opened URL ================================================== downloaded 1.7 Mb * installing *source* package ‘Rpad’ … ** package …
R "version" through web related.
Get The Hang $ 4.2.20 4 504—> cat ntest.R cat(“n”) for(i in 1:length(version)) { print(version[i]) cat(“”) } cat(“n”) $ 4.2.20 5 505—>
R – reading tabular files
commandline session > test print(test) V1 V2 1 Name Jeffrin 2 Age 35 3 Sex Male > version _ platform x86_64-pc-linux-gnu arch x86_64 os linux-gnu system x86_64, linux-gnu status major 2 minor 15.1 year 2012 month 06 day 22 svn rev 59600 language R version.string R version 2.15.1 (2012-06-22) nickname Roasted Marshmallows > Save workspace …
R – loading libraries and data related
Get The Hang > library(ggplot2) Error in library(ggplot2) : there is no package called ‘ggplot2’ > library(ggplot2) Loading required package: reshape Loading required package: plyr Attaching package: ‘reshape’ The following object(s) are masked from ‘package:plyr’: rename, round_any Loading required package: grid Loading required package: proto >