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Diffstat (limited to 'usr.bin/learn/lib/files/L5.1a')
| -rw-r--r-- | usr.bin/learn/lib/files/L5.1a | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/usr.bin/learn/lib/files/L5.1a b/usr.bin/learn/lib/files/L5.1a new file mode 100644 index 00000000000..6e206f480fb --- /dev/null +++ b/usr.bin/learn/lib/files/L5.1a @@ -0,0 +1,34 @@ +#print +Most UNIX commands, like "ls" and "cat", let you +specify any number of file names after the command. +To make this as easy as possible, there are some +ways to abbreviate file names. This is usually +faster and more accurate than typing out the list in full. + +For example, when the character "?" is used in a file name, +it will represent any character that might be +in a file name. That is, the name "a?" is +an abbreviation for the files "a1", "a2", "aa", +and so forth. You can say + ls a? +and if there are any file names beginning with +"a" that are exactly two letters long, the computer +will tell you their names. Try that here. +First list all the file names with "ls"; then type + ls a? +to get all the two letter names beginning with "a". +Then type "ready". +#create a1 +#create a12 +#create abcdef +#create ax +#create aa +#copyin +#user +#uncopyin +grep '^ls a?$' .copy >/dev/null +#log +#next +5.1b 0 +5.1c 5 +5.1e 10 |