Possible completions:
count Count occurrences
display Show additional kinds of information
except Show only text that does not match a pattern //排除正常数据的关键字，只显示有问题的。
find Search for first occurrence of pattern
hold Hold text without exiting the --More-- prompt
last Display end of output only
match Show only text that matches a pattern //只查看带关键字的内容。
匹配多个单词：match "CPU|Mem" //匹配含有CPU或者Mem的行
no-more Don't paginate output //不分页输出，默认是分页的。
refresh Refresh a continuous display of the command
request Make system-level requests
resolve Resolve IP addresses
save Save output text to file
trim Trim specified number of columns from start of line //从第一行修剪指定列号
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