last | cut -d ' ' -f 1 | sort | uniq#这个命令所实现的就是将last输出的每行数据使用空格切割并取出第一个片段输出,然后排序再取出不重复的数据 last | cut -d ' ' -f 1 | sort -u#这行命令实现的操作与上一行命令一致,但sort没有计数功能,如果要使用计数功能还是需要使用uniq命令 last | cut ...
条件语句用法: if [ condition ]; then your code elif [ condition ]; then your code else your code fi '[' 后面必须有空格, ']' 前面必须有空格 操作符前后必须有空格。 数值比较的测试条件操作符 条件含义 $a -lt $b $a < $b ($a 小于 $b) $a -gt $b $a > $b ($a 大于 $b) $...
(If n is omitted, the exit status is that of the last command executed. ) 格式:$? 上一个命令的退出码。 格式:trap "commands" EXIT 退出时执行commands指定的命令。( A trap on EXIT is executed before the shell terminates.) 退出码(exit status,或exit code)的约定: 0表示成功(Zero - Success...
首先,让我们在Code目录中创建一个名为Commands的新目录,在那里我们可以保存可执行脚本。然后我们将在~/.bash_profile中添加一行,以便将Commands添加到PATH。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 $ mkdir Commands $ nano ~/.bash_profile 内容为: 代码语言:javascript 代码运行次数:0 运行 AI代码...
Linux系统,普通权限用户使用root用户部署的conda,运行conda init bash出现如下错误,此外命令行的提示符也不见了。 [sudo] password for username: # >>> ERROR REPORT <<< Traceback (most recent call last): File "/software/apps/anaconda3/lib/python3.8/site-packages/conda/exceptions.py", line 1129, i...
>>> result.returncode 0 # 练习 >>> import subprocess >>> subprocess.run('ls') # ls >>> subprocess.run(['ls', '/home']) # 没有shell环境 >>> subprocess.run('ls /home') # FileNotFoundError #在shell环境中运行ls /home >>> subprocess.run('ls /home', shell=True) ...
Code Issues83 Pull requests Actions Projects2 Wiki Security Insights Additional navigation options dev 27Branches43Tags Code Folders and files Name Last commit message Last commit date Latest commit Utumno Merge branch 'ut-580-rename-fixups' into dev: ...
The error is caused by similar problems in Bash code, but is affected by multiple repetitions of “done”Test(forxin{1..200} ;doecho “for x$x in ; do :”;done;forxin{1. .200} ;doechodone;done) | bash || echo “Vulnerable by CVE-2014-7187, word_lineno” A vulnerable system ...
code=exited status=1 使用Docker 部署 Node.js 应用实战教程 PHP的回调后门 Linux CentOS 通过国内镜像源安装Docker和换源 查看Windows激活信息 docker logs:查看容器的日志或dcoker容器启动失败,查看启动错误信息 MySQL 数据库备份与恢复实战教程 Linux Xargs 命令的10个实用示例 修复Yum Error: Database Disk Image ...
To display the exit code for the last command you ran on the command line, use the following command: $echo$? The displayed response contains no pomp or circumstance. It's simply a number. You might also receive a shell error message from Bash further describing the error, but the exit ...