這如何計算文件中的行數? no_of_lines=`<$file wc -l` [英]How does this work to count number of lines in a file? no_of_lines=`<$file wc -l`
返回的行數比Linux`wc -l`高得多的Python代碼 [英]Python code for number of lines returning much higher number than Linux `wc -l`
使用 dup2 和 pipe() 執行命令“ls -l | grep ^d | wc” [英]Execute the command " ls -l | grep ^d | wc " using dup2 and pipe()