Linux see the file size in MB with ls -l command

linux ls -l command

manohar@mani:~/git/prime-services$ ls -l
total 76
drwxrwxr-x 6 manohar manohar  4096 2013-01-25 11:37 authentication
-rw-rw-r-- 1 manohar manohar 10020 2013-01-24 14:10 build.gradle
-rw-rw-r-- 1 manohar manohar 10085 2012-10-31 22:16 build.gradle.cobertura
drwxrwxr-x 4 manohar manohar  4096 2012-07-02 14:50 ci
drwxrwxr-x 6 manohar manohar  4096 2013-01-25 11:37 context
drwxrwxr-x 9 manohar manohar  4096 2013-01-25 11:37 eventrouter
drwxrwxr-x 3 manohar manohar  4096 2012-07-02 14:50 example
-rw-rw-r-- 1 manohar manohar   602 2012-07-02 14:50 README
drwxrwxr-x 6 manohar manohar  4096 2013-01-25 11:37 reporting-dao
drwxrwxr-x 5 manohar manohar  4096 2013-01-25 11:37 routing-service
drwxrwxr-x 2 manohar manohar  4096 2013-01-21 11:30 scripts
-rw-rw-r-- 1 manohar manohar   129 2012-11-24 17:26 settings.gradle
drwxrwxr-x 6 manohar manohar  4096 2013-01-25 11:37 shared
drwxrwxr-x 9 manohar manohar  4096 2013-01-25 11:37 web-service
drwxrwxr-x 5 manohar manohar  4096 2013-01-25 11:37 ws-reporting
manohar@mani:~/git/prime-services$ 

To see file size in MB in linux ls -l command.

ls -l | awk '{printf "%s %i %s %s %.3fMB %s %i %s %s\n", $1,$2,$3,$4,$5/1024000,$6,$7,$8,$9}'

manohar@mani:~/git/prime-services$ ls -l | awk '{printf "%s %i %s %s %.3fMB %s %i %s %s\n", $1,$2,$3,$4,$5/1024000,$6,$7,$8,$9}'
total 76   0.000MB  0  
drwxrwxr-x 6 manohar manohar 0.004MB 2013-01-25 11 authentication 
-rw-rw-r-- 1 manohar manohar 0.010MB 2013-01-24 14 build.gradle 
-rw-rw-r-- 1 manohar manohar 0.010MB 2012-10-31 22 build.gradle.cobertura 
drwxrwxr-x 4 manohar manohar 0.004MB 2012-07-02 14 ci 
drwxrwxr-x 6 manohar manohar 0.004MB 2013-01-25 11 context 
drwxrwxr-x 9 manohar manohar 0.004MB 2013-01-25 11 eventrouter 
drwxrwxr-x 3 manohar manohar 0.004MB 2012-07-02 14 example 
-rw-rw-r-- 1 manohar manohar 0.001MB 2012-07-02 14 README 
drwxrwxr-x 6 manohar manohar 0.004MB 2013-01-25 11 reporting-dao 
drwxrwxr-x 5 manohar manohar 0.004MB 2013-01-25 11 routing-service 
drwxrwxr-x 2 manohar manohar 0.004MB 2013-01-21 11 scripts 
-rw-rw-r-- 1 manohar manohar 0.000MB 2012-11-24 17 settings.gradle 
drwxrwxr-x 6 manohar manohar 0.004MB 2013-01-25 11 shared 
drwxrwxr-x 9 manohar manohar 0.004MB 2013-01-25 11 web-service 
drwxrwxr-x 5 manohar manohar 0.004MB 2013-01-25 11 ws-reporting 
manohar@mani:~/git/prime-services$ 

Truncating log files in UNIX/Linux

Most of the time we need log files to be truncated for many reasons. We can use the below command to truncate the file contents.

sudo cp /dev/null trafficking.log

Get the process id by its name

ps -ef | grep mysql