Linux: Sort du -h (human-readable) Output By Size
last updated in Categories BASH Shell, Debian / Ubuntu, Linux, Ubuntu Linux
Tag: human readable format
Linux Find Out CPU Architecture Information
last updated in Categories CentOS, Debian / Ubuntu, Hardware, Linux, RedHat and Friends, SuseUbuntu Check RAM Memory Chip Speed and Specification From Within a Linux System
last updated in Categories Ubuntu Linux
I want to add more RAM to my server running Ubuntu Linux. How do I find out my current RAM chip information such as its speed, type and manufacturer name within a Linux system without opening the case?
du Command Output In Human Readable Format ( GB / MB / TB )
last updated in Categories LinuxI need to get a list of sizes in human readable du output format. How do I get the output for du command in GB under Linux or UNIX operating systems?
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Linux Date Command: Convert Named Stats Dump Date
last updated in Categories BASH Shell, Bind dns
The rndc stats commands created /var/named/chroot/var/named/data/named_stats.txt file under RHEL 5.x or CentOS 5.x BIND 9 server. However, date is not is correct format. The date is in the following format:
grep ‘Dump’ /var/named/chroot/var/named/data/named_stats.txt
outputs:
+++ Statistics Dump +++ (1263408025)
— Statistics Dump — (1263408025)
+++ Statistics Dump +++ (1263408071)
— Statistics Dump — (1263408071)
+++ Statistics Dump +++ (1268304218)
— Statistics Dump — (1268304218)
+++ Statistics Dump +++ (1268304248)
— Statistics Dump — (1268304248)
How do I convert date (e.g., 1263408025) in a human readable format?
Shell Scripting: Check File Size ( Find File Size )
last updated in Categories BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, RedHat and Friends, Suse, Ubuntu Linux, UNIXHow do I find out file size under UNIX / Linux operating system and store the same to a variable called s?
Find the file permission without using ls -l command
last updated in Categories BASH Shell, CentOS, HP-UX Unix, Linux, RedHat and Friends, Solaris-Unix, Ubuntu Linux, UNIXQ. I need to find file permission and store the same to a shell variable. How do I find out the file permission without parsing ls -l output?
A. Use GNU stat command to display file or file system status. It has option to display output in specific format.
Display stat for /etc/passwd file
Type the following command:
$ stat /etc/passwd
Output:
File: `/etc/passwd' Size: 1675 Blocks: 8 IO Block: 4096 regular file Device: 802h/2050d Inode: 7899368 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2007-12-05 08:20:31.000000000 +0530 Modify: 2007-12-04 23:36:50.000000000 +0530 Change: 2007-12-04 23:36:50.000000000 +0530
Print access rights in octal format:
$ stat -c %a /etc/passwd
Output:
644
Print access rights in human readable format, enter:
$ stat -c %A /etc/passwd
Output:
-rw-r--r--
Store access rights in octal format to a shell variable:
$ VAR=$(stat -c %a /etc/passwd)
$ echo $VAR
Other valid format sequences for files
- %b : Number of blocks allocated (see %B)
- %B : The size in bytes of each block reported
- %d : Device number in decimal
- %C : SELinux security context
- %D : Device number in hex
- %f : Raw mode in hex
- %F : File type
- %g : Group ID of owner
- %G : Group name of owner
- %h : Number of hard links
- %i : Inode number
- %n : File name
- %N : Quoted file name with dereference if symbolic link
- %o : I/O block size
- %s : Total size, in bytes
- %t : Major device type in hex
- %T : Minor device type in hex
- %u : User ID of owner
- %U : User name of owner
- %x : Time of last access
- %X : Time of last access as seconds since Epoch
- %y : Time of last modification
- %Y : Time of last modification as seconds since Epoch
- %z : Time of last change
- %Z : Time of last change as seconds since Epoch