Linux 基础

推荐阅读

https://101.lug.ustc.edu.cn/

更新日期

2021-01-27

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curl

curl: error while loading shared libraries: libssl.so.1.0.0: cannot open shared object file: No such file or directory curl: symbol lookup error: curl: undefined symbol: curl_mime_free

升级 conda conda update conda 解决问题。

tldr

非常简洁的命令用法查询工具。

$ sudo apt install tldr
$ tldr tar  # 查询 tar 的用法

执行命令会自动克隆远程仓库到 ~/.tldr 文件夹。

trap ... DEBUG

解决 SHELL 指令同时显示命令和执行结果，以 echo 开头的行只显示结果的问题。

trap DEBUG 表示读取每行的命令赋予变量 $BASH_COMMAND，先执行 trap DEBUG 中间的命令后在执行 $BASH_COMMAND。

$ cat test.sh
    trap '[[ $BASH_COMMAND != echo* ]] && echo $BASH_COMMAND' DEBUG
    echo 显示 GMT 的版本号
    gmt --version

$ bash test.sh
    显示 GMT 的版本号
    gmt --version
    6.1.1

x11

seisman:

The biggest difference is: libx11-6 only provides libraries, while libx11-dev provides both header files and libraries (libx11-dev depends on libx11-6).

When you run SAC, you need libraries, so libx11-6 must be installed.

When you want to build SAC from source codes, you need both libraries and headers, so you have to install libx11-dev.

That’s also why the libx11-dev package has the -dev suffix, because you only need it when you’re developing something (i.e., compileing a package from source).