ERROR: Unsupported SysV option.
ERROR: Unsupported SysV option.
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也许有幸，碰到了这个错误提示，不要慌。
请使用eval对字符串重新执行shell解析。
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例如：
CMND="ps -ef"
$CMND
是可以正常执行地。
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CMND="ps -ef|grep sshd"
$CMND
就会得到上面的错误了。
因为 "ps -ef|grep sshd" 不会被再次解析，管道符失效。
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eval $CMND
这样就可以再解析一次。
PS：注意单引号，双引号，转义。
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================ 具体错误信息================
ERROR: Unsupported SysV option.
********* simple selection *********? ********* selection by list *********
-A all processes????????????????????? -C by command name
-N negate selection?????????????????? -G by real group ID (supports names)
-a all w/ tty except session leaders? -U by real user ID (supports names)
-d all except session leaders???????? -g by session OR by effective group name
-e all processes????????????????????? -p by process ID
T? all processes on this terminal???? -s processes in the sessions given
a? all w/ tty, including other users? -t by tty
g? OBSOLETE -- DO NOT USE???????????? -u by effective user ID (supports names)
r? only running processes???????????? U? processes for specified users
x? processes w/o controlling ttys???? t? by tty
*********** output format **********? *********** long options ***********
-o,o user-defined? -f full??????????? --Group --User --pid --cols --ppid
-j,j job control?? s? signal????????? --group --user --sid --rows --info
-O,O preloaded -o? v? virtual memory? --cumulative --format --deselect
-l,l long????????? u? user-oriented?? --sort --tty --forest --version
-F?? extra full??? X? registers?????? --heading --no-heading --context
??????????????????? ********* misc options *********
-V,V? show version????? L? list format codes? f? ASCII art forest
-m,m,-L,-T,H? threads?? S? children in sum??? -y change -l format
-M,Z? security data???? c? true command name? -c scheduling class
-w,w? wide output?????? n? numeric WCHAN,UID? -H process hierarchy
也行吧？ 2 楼 trydofor 2010-07-30 fujohnwang 写道grep sshd < `ps -ef`
也行吧？
bash-3.00# xxx='grep sshd < `ps -ef`'
-bash-3.00# $xxx
grep: sshd: No such file or directory
grep: <: No such file or directory
grep: `ps: No such file or directory
-bash-3.00# echo $xxx
grep sshd < `ps -ef`
3 楼 trydofor 2010-07-30 -bash-3.00# grep sshd < `ps -ef`
-bash: `ps -ef`: ambiguous redirect