有时候我们想按照文件的大小来排序，一直忘记，为此特记下如下操作
按照文件所占的大小从大开始排列
# ls -lS
total 64
-rw-r--r-- 1 root root 55895 Nov 5 22:01 all.log
-rw-r--r-- 1 root root 6356 Nov 5 22:35 all.tar.gz
drwx------. 3 root root 17 Oct 25 16:22 systemd-private-27df22a4d93a4d489d3ac1494f38a459-httpd.service-MZGAp4
drwx------. 3 root root 17 Oct 25 16:07 systemd-private-27df22a4d93a4d489d3ac1494f38a459-mariadb.service-WL8NGJ
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-httpd.service-CqimqR
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-mariadb.service-sED24g
drwx------. 2 root root 6 Oct 21 11:58 vmware-root
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15442-2958697629
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15461-4256151916
drwx------ 2 root root 6 Nov 5 08:50 vmware-root_557-4282236562
drwx------ 2 root root 6 Nov 4 19:39 vmware-root_561-4290035465
drwx------ 2 root root 6 Oct 28 14:10 vmware-root_562-2965513557
#按文件的大小从小到大来排列
# ls -lSr
total 64
drwx------ 2 root root 6 Oct 28 14:10 vmware-root_562-2965513557
drwx------ 2 root root 6 Nov 4 19:39 vmware-root_561-4290035465
drwx------ 2 root root 6 Nov 5 08:50 vmware-root_557-4282236562
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15461-4256151916
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15442-2958697629
drwx------. 2 root root 6 Oct 21 11:58 vmware-root
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-mariadb.service-sED24g
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-httpd.service-CqimqR
drwx------. 3 root root 17 Oct 25 16:07 systemd-private-27df22a4d93a4d489d3ac1494f38a459-mariadb.service-WL8NGJ
drwx------. 3 root root 17 Oct 25 16:22 systemd-private-27df22a4d93a4d489d3ac1494f38a459-httpd.service-MZGAp4
-rw-r--r-- 1 root root 6356 Nov 5 22:35 all.tar.gz
-rw-r--r-- 1 root root 55895 Nov 5 22:01 all.log
同时这里也记录一下按修改时间来排列
#按文件修改的日期从新到旧来排序
# ls -lt
total 64
-rw-r--r-- 1 root root 6356 Nov 5 22:35 all.tar.gz
-rw-r--r-- 1 root root 55895 Nov 5 22:01 all.log
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-mariadb.service-sED24g
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-httpd.service-CqimqR
drwx------ 2 root root 6 Nov 5 08:50 vmware-root_557-4282236562
drwx------ 2 root root 6 Nov 4 19:39 vmware-root_561-4290035465
drwx------ 2 root root 6 Oct 28 14:10 vmware-root_562-2965513557
drwx------. 3 root root 17 Oct 25 16:22 systemd-private-27df22a4d93a4d489d3ac1494f38a459-httpd.service-MZGAp4
drwx------. 3 root root 17 Oct 25 16:07 systemd-private-27df22a4d93a4d489d3ac1494f38a459-mariadb.service-WL8NGJ
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15461-4256151916
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15442-2958697629
drwx------. 2 root root 6 Oct 21 11:58 vmware-root
##按文件修改的日期从旧到新来排序 ，-r就是倒序
# ls -lrt
total 64
drwx------. 2 root root 6 Oct 21 11:58 vmware-root
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15442-2958697629
drwx------. 2 root root 6 Oct 25 15:56 vmware-root_15461-4256151916
drwx------. 3 root root 17 Oct 25 16:07 systemd-private-27df22a4d93a4d489d3ac1494f38a459-mariadb.service-WL8NGJ
drwx------. 3 root root 17 Oct 25 16:22 systemd-private-27df22a4d93a4d489d3ac1494f38a459-httpd.service-MZGAp4
drwx------ 2 root root 6 Oct 28 14:10 vmware-root_562-2965513557
drwx------ 2 root root 6 Nov 4 19:39 vmware-root_561-4290035465
drwx------ 2 root root 6 Nov 5 08:50 vmware-root_557-4282236562
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-httpd.service-CqimqR
drwx------ 3 root root 17 Nov 5 08:50 systemd-private-5cba973031874b1cac7c3ed4293a8422-mariadb.service-sED24g
-rw-r--r-- 1 root root 55895 Nov 5 22:01 all.log
-rw-r--r-- 1 root root 6356 Nov 5 22:35 all.tar.gz
#统计此目录下的文件夹的数量
# ls -l|grep ^d|wc -l
10
#统计此目录下的文件的数量
# ls -l|grep ^-|wc -l
2
有时候，这些ls命令的用处体现在工作中，有时候忘记，到处找，现在记录下来，方便查看