主页 / server / 问题 / 1169220
Accepted
Gautam Somani
Asked: 2024-12-24 07:01:06 +0800 CST

如果我在 head -n 中使用除 1 之外的任何其他数字，Bash 就不会使用 PATH 中定义的 PATH

  • 772

这对我来说有点搞笑。我有一个文件，我正在循环运行awk和cut命令，由head命令提供。命令是：

head -n X all.du.K.txt | while read line ; do NON_APP=$(echo ${line} | awk '{print $1}' | cut -d"," -f2) ; APP=$(echo ${line} | awk '{print $2}' | cut -d"," -f2) ; PATH=$(echo ${line} | awk '{print $3}') ; echo ${PATH},${NON_APP},${APP} ; done >> final.csv

如果 X 是 1，它可以工作，但如果 X 是 2 或任何其他数字，我就会收到以下错误：

head -n 2 all.du.K.txt | 读取行时；执行 NON_APP=$(echo ${line} | awk '{print $1}' | cut -d"," -f2) ; APP=$(echo ${line} | awk '{print $2}' | cut -d"," -f2) ; PATH=$(echo ${line} | awk '{print $3}') ; echo ${PATH},${NON_APP},${APP} ; 完成 >> final.csv

命令“cut”可在以下位置使用

  • /bin/cut
  • /usr/bin/cut 无法找到命令，因为 '/bin:/usr/bin' 未包含在 PATH 环境变量中。cut：未找到命令 命令“awk”可在以下位置使用
  • /bin/awk
  • /usr/bin/awk 无法找到命令，因为 '/bin:/usr/bin' 未包含在 PATH 环境变量中。awk：未找到命令 命令“awk”可在以下位置使用
  • /bin/awk
  • /usr/bin/awk 无法找到命令，因为 '/usr/bin:/bin' 未包含在 PATH 环境变量中。awk：未找到命令 命令“cut”可在以下位置使用
  • /bin/cut
  • /usr/bin/cut 无法找到命令，因为 '/usr/bin:/bin' 未包含在 PATH 环境变量中。cut：未找到命令 命令“awk”可在以下位置使用
  • /bin/awk
  • /usr/bin/awk 找不到命令，因为 PATH 环境变量中不包含“/usr/bin:/bin”。awk：未找到命令

我的 $PATH 环境如下：

/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

如果在set -x on 的情况下运行上述循环，我会得到以下输出，仅供大家参考：

  • head -n 2 all.du.K.txt
  • 读取行 ++ echo /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c,5375K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c,17086K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c ++ awk'{打印$ 1}' ++ cut -d，-f2
  • NON_APP = 5375K ++ echo /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c，5375K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c，17086K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c ++ awk'{打印$ 2}' ++ cut -d，-f2
  • APP = 17086K ++ echo /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c，5375K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c，17086K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c ++ awk'{打印$ 3}'
  • PATH = / var / opt / gitlab / gitlab-rails /共享/artifacts / e0 / e7 / e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c
  • 回显/var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c，5375K，17086K
  • 读取行 ++ echo /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,145K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,191K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4 ++ awk '{print $1}' ++ '[' -x /usr/lib/command-not-found ']' ++ cut -d, -f2 ++ /usr/lib/command-not-found -- awk ++ '[' -x /usr/lib/command-not-found ']' ++ /usr/lib/command-not-found -- cut 命令 'cut' 可在以下位置使用
  • /bin/cut
  • /usr/bin/cut 无法找到命令，因为 '/usr/bin:/bin' 未包含在 PATH 环境变量中。cut：未找到命令 命令“awk”可在以下位置使用
  • /bin/awk
  • /usr/bin/awk 找不到命令，因为 '/usr/bin:/bin' 未包含在 PATH 环境变量中。awk：未找到命令 ++ 返回 127 ++ 返回 127
  • NON_APP = ++ 回显/var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,145K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,191K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4 ++ awk '{print $2}' ++ '[' -x /usr/lib/command-not-found ']' ++ /usr/lib/command-not-found -- awk ++ cut -d, -f2 ++ '[' -x /usr/lib/command-not-found ']' ++ /usr/lib/command-not-found -- cut 命令'cut'可在以下位置使用
  • /bin/cut
  • /usr/bin/cut 无法找到命令，因为 '/bin:/usr/bin' 未包含在 PATH 环境变量中。cut：未找到命令 命令“awk”可在以下位置使用
  • /bin/awk
  • /usr/bin/awk 找不到命令，因为 '/usr/bin:/bin' 未包含在 PATH 环境变量中。awk：未找到命令 ++ 返回 127 ++ 返回 127
  • APP = ++ echo /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,145K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,191K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4 ++ awk '{print $3}' ++ '[' -x /usr/lib/command-not-found ']' ++ /usr/lib/command-not-found -- awk 命令 'awk' 可在以下位置使用
  • /bin/awk
  • /usr/bin/awk 找不到命令，因为 PATH 环境变量中不包含“/usr/bin:/bin”。awk：未找到命令 ++ 返回 127
  • 路径=
  • 回音，，
  • 读行

来自我的输入文件的示例：

/var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c,5375K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c,17086K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/e7/e0e72896f2d07d134de6efb2d6541bed7e297e17f010f67f30247abc56d92c6c /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,145K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4,191K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/38/e03865e0382175da3126eb126534c2d3c9b4cf69483fa8a167d05c070360edc4 /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/f2/e0f23d7875aff9c6b4ef20f27e7d38c4e312811ae627319267f566a4dc244636,168K /var/opt/gitlab/gitlab-rails/shared/artifacts/e0/f2/e0f23d7875aff9c6b4ef20f27e7d38c4e312811ae627319267f566a4dc244636,555K /var/opt/gitlab/gitlab-rails/共享/artifacts/e0/f2/e0f23d7875aff9c6b4ef20f27e7d38c4e312811ae627319267f566a4dc244636

知道这里发生了什么有趣的事情吗？ Bash 版本是“GNU bash，版本 5.0.17(1)-release (x86_64-pc-linux-gnu)”

bash

1 个回答

  1. Best Answer

    您正在循环中覆盖 $PATH ：

    PATH=$(echo ${line} | awk '{print $3}')

    您应该为此变量使用不同的名称，例如APP_PATH。

    • 1

相关问题