# Folding Filenames to Lower Case > [HTML Version](foldingfilenames.htm) One additional consideration when transferring files to Unix is that the filenames must all be folded to lower case. If your PC-based FTP package does not support an option for this (a problem with the built-in W95 ftp.exe), then we advise getting one that does (such as ZTERM or WS\_FTP Pro.) If that is not practical, or you forget and end up with thousands of files with mixed upper and lower case names, there is a utility script called **trlcs** in the /vm/miame/bin directory which will properly fold one or more filenames (based on a wildcard spec) in a single directory to lower case. It does, however, require that you execute the command in each of your directories. For example: \$ cd /vm/miame/dsk0/020001 \$ trlcs '\*' \$ cd ../020002 \$ trlcs '\*' (Note that if a wildcard specification is given, it must be quoted.) If for some reason you do not have the **trlcs** command, you can create it by typing in the following and then using chmod +x trlcs to make it executable: \# trlcs: converts wildcarded files to lower case names if \[ \$# \!= 1 \] then echo "trlcs converts names of files in wildspec list to lcs" echo "usage: trlcs \\047wildspec\\047 (wildspec must be quoted)" else for f in \$1; do mv \$f \`echo \$f | tr A-Z a-z\` done fi