Linux wc指令

liyaweihesmz

那位大神帮忙看看这条命令那错了ps -aux | wc -l？
我执行完提示错误信息Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.8/FAQ
177。
大神帮忙指点一下啊，谢了。

carllai

重定向到一个文本再统计呢

ps -aux > ps.txt
wc -l ps.txt

chenyx

[chenyx@5250 ~]$ ps aux | wc -l
95
[chenyx@5250 ~]$ ps -aux | wc -l
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ
95

我的也是这样.

qinyudd

ps aux

man ps


Note that "ps -aux" is distinct from "ps aux". The POSIX and UNIX standards require that "ps -aux" print all processes owned by a user
       named "x", as well as printing all processes that would be selected by the -a option. If the user named "x" does not exist, this ps
       may interpret the command as "ps aux" instead and print a warning. This behavior is intended to aid in transitioning old scripts and
       habits. It is fragile, subject to change, and thus should not be relied upon.

zongg

1. ps aux | wc -l

复制代码

wolf_xiao

       wc - print the number of newlines, words, and bytes in files
也就是说WC这个命令只能对文件进行统计

q1208c

ps aux 是没有 "-"的.

Linux的 ps 支持两种风格的参数, 有些带 "-", 有些不带"-", 具体的可以man ps 查看一下, 我不记得太多了.

vinckdu

不是WC的问题，是PS -aux的问题。 不应该加-  ，应该是ps aux