学步园

[root@localhost program_test]# du -a -h ./
320K    ./output.tar
96K     ./reslt_yang.txt
4.0K    ./curr_dir.md5
4.0K    ./sed_data.txt

[root@localhost program_test]# du -h -c ./
48K     ./main
4.0K    ./abc
16K     ./dd_test
544K    ./tar-file
404K    ./touch_more/test_unzip
984K    ./touch_more
2.9M    ./
2.9M    total

//只显示统计 -s

[root@localhost program_test]# du -s -h ./
2.9M    ./

[root@localhost program_test]# du -ak ./ | sort -nrk 1 | head -n 5
2876    ./
984     ./touch_more
544     ./tar-file
404     ./touch_more/test_unzip
320     ./tar-file/output.tar

[root@localhost program_test]# find ./ -type f -exec du -k {} \; | sort -nrk 1 | head -n 3
320     ./tar-file/output.tar
320     ./output.tar
212     ./11.txt

[root@localhost program_test]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/sda2        18G  2.5G   15G  16% /
tmpfs           504M   80K  504M   1% /dev/shm
/dev/sda1       291M   33M  244M  12% /boot

[root@localhost pts]# who
yxy      tty1         2015-01-02 22:36 (:0)
yxy       pts/1        2015-01-02 22:37 (:0.0)
yxy        pts/2        2015-01-02 22:37 (192.168.119.1)
yxy       pts/3        2015-01-02 22:37 (192.168.119.1)
[root@localhost pts]# w
23:19:38 up 46 min,  4 users,  load average: 0.00, 0.02, 0.00
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT

[root@localhost pts]# last
ycy      pts/0        192.168.119.1    Fri Jan  2 23:21   still logged in 

[root@localhost pts]# lastb
centos   ssh:notty    192.168.119.128  Fri Jan  2 22:59 - 22:59  (00:00)    
centos   ssh:notty    192.168.119.128  Fri Jan  2 22:59 - 22:59  (00:00)    
centos   ssh:notty    192.168.119.128  Fri Jan  2 22:59 - 22:59  (00:00) 

[root@localhost program_test]# cat top10_cmds.sh 
#!/bin/bash

printf "COMMAND\t COUNT\n"

cat ~/.bash_history | awk '{ list[$1]++ } \
END{
for(i in list)
{
printf("%s\t %d\n",i, list[i]); }
}' | sort -nrk 2 | head

//执行结果如下：
[root@localhost program_test]# ./top10_cmds.sh 
COMMAND  COUNT
vi       88
find     82
[root@localhost  75
echo     72
cat      72
ls       65
ll       28
sh       25
seq      22
./word_freq.sh   21