管道后的“未找到命令”
管道后的“未找到命令”
提问于 2019-05-27 01:12:37
如果在管道之后调用某些命令，则会返回“未找到命令”。
我检查了它们是否安装在哪里，在最近的版本中，以及它们是否在$PATH中。背景:通过自制软件安装的MacOS 10.14.5、gnu实用程序和其他命令，手动设置$PATHS和$MANPATHS。
$ echo -e ${PATH//:/\\n} | cut -d '/' -f 1
-bash: cut: Command not found.
$ echo -e ${PATH//:/\\n} | grep '/usr/'
-bash: grep: Command not found.
$ which cut
/usr/local/opt/coreutils/libexec/gnubin/cut
$ which grep
/usr/local/opt/grep/libexec/gnubin/grep
$ cut --version
cut (GNU coreutils) 8.31...
$ grep --version
grep (GNU grep) 3.3...
$ bash --version
GNU bash, Version 5.0.7(1)-release (x86_64-apple-darwin18.5.0)...
$ echo -e ${PATH//:/\\n}
/usr/local/opt/openssl/bin
/usr/local/opt/coreutils/libexec/gnubin
/usr/local/opt/ed/libexec/gnubin
/usr/local/opt/findutils/libexec/gnubin
/usr/local/opt/gawk/libexec/gnubin
/usr/local/opt/gnu-indent/libexec/gnubin
/usr/local/opt/gnu-sed/libexec/gnubin
/usr/local/opt/gnu-tar/libexec/gnubin
/usr/local/opt/gnu-time/libexec/gnubin
/usr/local/opt/gnu-units/libexec/gnubin
/usr/local/opt/gnu-which/libexec/gnubin
/usr/local/opt/grep/libexec/gnubin
/usr/local/opt/inetutils/libexec/gnubin
/usr/local/opt/make/libexec/gnubin
/Users/xxxx/.jenv/shims
/Users/xxxx/.jenv/bin
/usr/local/opt/icu4c/sbin
/usr/local/opt/icu4c/bin
/usr/local/opt/gettext/bin
/usr/local/opt/binutils/bin
/usr/local/bin
/usr/local/sbin
/usr/bin
/bin
/usr/sbin
/sbin
/opt/X11/bin
/usr/local/opt/e2fsprogs/bin
/usr/local/opt/e2fsprogs/sbin这些命令在单行和其他多行输入中确实有效：
$ echo "asdfdfasdfsadf" | cut -c 4-8
fdfas
$ echo "asdfdfasdfsadf" | grep 'df'
asdfdfasdfsadf
$ echo "asdfdfasdfsadf" | grep -v 'df'
$ ls -l | grep aps
drwx------ 25 xxxx staff 800 Mai 17 23:33 Maps我还在管道之后尝试了sort和xargs：相同的行为。
也许echo -e ${PATH//:/\\n}的多行返回是罪魁祸首，或者是安装/设置有问题？
后者更有可能，因为这一点：
$ which cut
/usr/local/opt/coreutils/libexec/gnubin/cut
$ whereis cut
/usr/bin/cut
$ which grep
/usr/local/opt/grep/libexec/gnubin/grep
$ whereis grep
/usr/bin/grep我承认我完全被弄糊涂了。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/56315722
复制相关文章
相似问题