Xargs reads data from a pipe and runs a specified command for every line read.
xargs命令可从管道中读取数据并为每行读取内容运行指定命令。
When you call this routine, a dictionary is returned that reflects the user-specified command line options.
在调用这个例程时,返回一个词典,它反映用户指定的命令行选项。
The truss command can either execute a specified command or attach to an existing process to produce a trace (assuming that you own the running process or have root privileges).
truss命令既可以执行指定的命令,也可以附加到现有的进程上生成跟踪(假设您拥有这个正在运行的进程或者具有根特权)。
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