There are many useful Linux commands that are fun to use and can do some very cool things.
cat mysongpart2.mp3 >> mysongpart1.mp3 |
Using /bin/cat to append the second part of a MP3 file onto the first part, making one large file that will play seamlessly from part one to part 2.
vmstat -a -d |
Displaying information about the reads and writes performed by your disks. Example output below.
lovecraft@Shothoth ~ $ vmstat -a -d disk- ------------reads------------ ------------writes----------- -----IO------ total merged sectors ms total merged sectors ms cur sec sda 170 3 1384 328 0 0 0 0 0 0 sdb 1532 4161 46414 4180 17 0 136 36 0 2 sdd 27106 616234 4305488 79824 4013 282825 2294704 1908904 0 79 sde 0 0 0 0 0 0 0 0 0 0 sdf 0 0 0 0 0 0 0 0 0 0 sdg 0 0 0 0 0 0 0 0 0 0 sdh 0 0 0 0 0 0 0 0 0 0 sdi 60148 58426 3337678 297136 86521 613992 5600520 3695032 0 473 sr1 40 0 160 140 0 0 0 0 0 0 loop0 0 0 0 0 0 0 0 0 0 0 loop1 0 0 0 0 0 0 0 0 0 0 loop2 0 0 0 0 0 0 0 0 0 0 loop3 0 0 0 0 0 0 0 0 0 0 loop4 0 0 0 0 0 0 0 0 0 0 loop5 0 0 0 0 0 0 0 0 0 0 loop6 0 0 0 0 0 0 0 0 0 0 loop7 0 0 0 0 0 0 0 0 0 0 sdc 748 10451 34111 18732 5502 1486 1210206 24203200 0 212 lovecraft@Shothoth ~ $ |
Showing all logged in users.
w |
Example output below.
lovecraft@Shothoth ~ $ w 22:29:54 up 1 day, 1:30, 4 users, load average: 0.14, 0.27, 0.23 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT lovecraf tty2 Sun21 6:39m 0.80s 0.79s -bash lovecraf tty3 Sun21 25:29m 0.16s 0.15s -bash lovecraf tty8 :0 20:35 15:30m 2:43 0.20s gnome-session lovecraf pts/0 :0.0 22:15 0.00s 0.29s 0.00s w |
Deleting files from within a tarball. Excellent tip here: http://www.thelinuxdaily.com/2011/08/remove-a-file-directory-from-a-tarball-without-extracting-first/.
Display a list of all users currently logged into the current machine.
ubuntu ~ $ users
ubuntu |