bash string substitution

so in this case we have files named like this: 

track01.cdda.wav.mp3  track06.cdda.wav.mp3  track11.cdda.wav.mp3
track02.cdda.wav.mp3  track07.cdda.wav.mp3  track12.cdda.wav.mp3
track03.cdda.wav.mp3  track08.cdda.wav.mp3  track13.cdda.wav.mp3
track04.cdda.wav.mp3  track09.cdda.wav.mp3
track05.cdda.wav.mp3  track10.cdda.wav.mp3

but we want to rename them so they are like "05.mp3"

#the first "track" is actually a variable name but does not need $ because it is already referenced by the ${track
for track in `ls *.mp3`; do name=${track/track/}; name=${name/.cdda.wav/}; mv $track $name; done

The main part of the code above is the following:



${track is the name of the variable that has the string you want to substitute

/track/ means search for the string "track" in that variable and replace with nothing.

If we had wanted to change it to something else:



bash, substitutionso, cdda, wav, mp, rename, quot, variable, referenced, ls, mv, substitute, somethingelse,

Latest Articles

  • How high can a Xeon CPU get?
  • bash fix PATH environment variable "command not found" solution
  • Ubuntu Linux Mint Debian Redhat Youtube Cannot Play HD or 4K videos, dropped frames or high CPU usage with Nvidia or AMD Driver
  • hostapd example configuration for high speed AC on 5GHz using WPA2
  • hostapd how to enable and use WPS to connect wireless devices like printers
  • Dell Server Workstation iDRAC Dead after Firmware Update Solution R720, R320, R730
  • Cloned VM/Server/Computer in Linux won't boot and goes to initramfs busybox Solution
  • How To Add Windows 7 8 10 11 to GRUB Boot List Dual Booting
  • How to configure OpenDKIM on Linux with Postfix and setup bind zonefile
  • Debian Ubuntu 10/11/12 Linux how to get tftpd-hpa server setup tutorial
  • efibootmgr: option requires an argument -- 'd' efibootmgr version 15 grub-install.real: error: efibootmgr failed to register the boot entry: Operation not permitted.
  • Apache Error Won't start SSL Cert Issue Solution Unable to configure verify locations for client authentication SSL Library Error: 151441510 error:0906D066:PEM routines:PEM_read_bio:bad end line SSL Library Error: 185090057 error:0B084009:x509 certif
  • Linux Debian Mint Ubuntu Bridge br0 gets random IP
  • redis requirements
  • How to kill a docker swarm
  • docker swarm silly issues
  • isc-dhcp-server dhcpd how to get longer lease
  • nvidia cannot resume from sleep Comm: Tainted: Linux Ubuntu Mint Debian
  • zfs and LUKS how to recover in Linux
  • [error] (28)No space left on device: Cannot create SSLMutex Apache Solution Linux CentOS Ubuntu Debian Mint