【osx下的sed】

处理这类error：command i expects \ followed by text

https://stackoverflow.com/questions/14846304/sed-command-error-on-macos-x

解决办法：brew install gnu-sed

* 注意alias sed=gsed don’t work for bash script, as “Aliases are not expanded when the shell is not interactive, unless the expand_aliases shell option is set using shopt (see the description of shopt under SHELL BUILTIN COMMANDS below)” in bash manpage.

The best way is:

https://unix.stackexchange.com/questions/1496/why-doesnt-my-bash-script-recognize-aliases

just use a variable in the script.

GSED = /usr/loca/bin/gsed

$GSED ‘script’ file

sed的替换

【如何安装fortran】

https://www.zhihu.com/question/26534875

荆棘林荫的回答。

实际安装：

after you type >>brew install gcc

Installing dependencies for gcc: gmp, mpfr, libmpc, isl

/usr/local/Cellar/gmp/6.1.2_2: 18 files, 3.1MB, built in 4 minutes 16 seconds

/usr/local/Cellar/mpfr/4.0.1: 28 files, 4.6MB, built in 2 minutes 58 seconds

/usr/local/Cellar/libmpc/1.1.0: 12 files, 358.9KB, built in 1 minute 1 second

/usr/local/Cellar/isl/0.19: 66 files, 3.8MB, built in 1 minute 49 seconds

/usr/local/Cellar/gcc/7.3.0_1: 1,485 files, 290.0MB, built in 72 minutes 15 seconds

just be patient~

【vim配置】

set ruler

set number等

https://blog.csdn.net/YZHY_Ocean/article/details/7272222

各种快捷键：

http://www.cnblogs.com/smstars/archive/2013/05/18/3085342.html

u：撤销删除

【grep使用】

grep -v 用于反向选择！

https://stackoverflow.com/questions/3548453/negative-matching-using-grep-match-lines-that-do-not-contain-foo