Strange Log Entries?

Hi guys, got some strange httpd error logs on one of the linux boxes today and I was wondering if someone could help me understand what could be going on here?

Log Snippet:

sh: /ls: No such file or directory
sh: /echo: No such file or directory
sh: /hostname: No such file or directory
sh: /pwd: No such file or directory
sh: /df: No such file or directory
sh: /ps: No such file or directory
sh: /sync: No such file or directory
sh: /ls: No such file or directory
sh: /echo: No such file or directory
sh: /hostname: No such file or directory
sh: /pwd: No such file or directory
sh: /df: No such file or directory
sh: /ps: No such file or directory
sh: /sync: No such file or directory
And Also:

sh: /ls: No such file or directory
sh: /echo: No such file or directory
sh: /hostname: No such file or directory
sh: /pwd: No such file or directory
sh: /df: No such file or directory
sh: /ps: No such file or directory
sh: /sync: No such file or directory
sh: /ls: No such file or directory
sh: /echo: No such file or directory
sh: /hostname: No such file or directory
sh: /pwd: No such file or directory
sh: /df: No such file or directory
sh: /ps: No such file or directory
sh: /sync: No such file or directory
sh: /ls: No such file or directory
sh: /echo: No such file or directory
sh: /hostname: No such file or directory
sh: /pwd: No such file or directory
sh: /df: No such file or directory
sh: /ps: No such file or directory
sh: /sync: No such file or directory
Any Idea's ? Strange Log Entries?

 

 

 

 

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