When using chmod -R o+rx /data , you set the execute permission on all directories as well as files in the /data directory. To set the execute permission to directories only, and not to files, use chmod -R o+rX /data . The uppercase X ensures that…
Merging Data Adding Columns To merge two data frames (datasets) horizontally, use the merge function. In most cases, you join two data frames by one or more common key variables (i.e., an inner join). # merge two data frames by ID total <- merge(…
Reading Data There are a few principal functions reading data into R. read.table, read.csv, for reading tabular data readLines, for reading lines of a text file source, for reading in R code files (inverse of dump) dget, for reading in R code files (…
刚才打开一个别人的测试库,用root登陆了的,sqlplus / as sysdba竟然报错,奇怪,于是在自己的VM中模拟该过程. 新建了一个test用户: [test@liu bin]# ./sqlplus Error 6 initializing SQL*Plus Message file sp1<lang>.msb not found SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory 需…
usermod 命令修改系统帐户文件来反映通过命令行指定的变化 1. 首先看看usermod都是有哪些参数 [root@hxweb101 ~]$ usermod --help Usage: usermod [options] LOGIN Options: -a, --append append the user to the supplemental GROUPS (use only with -G) -c, --comment COMMENT new value of the GECOS fi…
问题1: 404 版本库中不存在该条目和(或)其修订版本. 1.1 GIT库: 参考:http://stackoverflow.com/questions/13000247/redmine-gitolite-issue-with-repository-permissions-and-more I managed to get it working pointing the original repo to Redmine, since both sit on the same machine,…
