Linux显示计算次数的结果

Linux显示计算次数的结果

youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free -cfree：选项需要一个参数 -- cUsage: free [options]Options: -b, --bytes         show output in bytes -k, --kilo          show output in kilobytes -m, --mega          show output in megabytes -g, --giga          show output in gigabytes     --tera          show output in terabytes -h, --human         show human-readable output     --si            use powers of 1000 not 1024 -l, --lohi          show detailed low and high memory statistics -o, --old           use old format (without -/+buffers/cache line) -t, --total         show total for RAM + swap -s N, --seconds N   repeat printing every N seconds -c N, --count N     repeat printing N times, then exit     --help     display this help and exit -V, --version  output version information and exitFor more details see free(1).youhaidong@youhaidong-ThinkPad-Edge-E545:~$ free --countfree: option '--count' requires an argumentUsage: free [options]Options: -b, --bytes         show output in bytes -k, --kilo          show output in kilobytes -m, --mega          show output in megabytes -g, --giga          show output in gigabytes     --tera          show output in terabytes -h, --human         show human-readable output     --si            use powers of 1000 not 1024 -l, --lohi          show detailed low and high memory statistics -o, --old           use old format (without -/+buffers/cache line) -t, --total         show total for RAM + swap -s N, --seconds N   repeat printing every N seconds -c N, --count N     repeat printing N times, then exit     --help     display this help and exit -V, --version  output version information and exitFor more details see free(1).