Example of zsh globbing and parameter expansion. (*.*)(.*) ... the pattern we want to act on, a period followed by a string and then period, we split the pattern into two sections which will become $1, the first part of the match, and $2, second {1//./_}$2 ... the parameter expansion for $1 with a string substitution, followed by the match $2, the second part of the pattern.

Example of zsh globing, glob qualifier, and substitution: -Q state that the parameter will contain a glob qualifier. (**/)(*) is recursive (.) is our glob qualifier, with states the match is a file "." The first parameter $1, is then substituted with $2 but with lowercasing '(L)' ... a (U) would of course be from lower to upper.

An example of zsh glob qualifiers.

Example of using zsh glob qualifier ... "." = files "f:" = files with access rights matching: o+w = other plus write

vim can open ssh/sftp and ftp connections for file editing using 'netrw'. If no path or file is provided vim opens the directory as a filelist. See: :help netrw.

zsh globbing and glob qualifier: '**/*' = recursive om = ouput by modification (last access) [1,20] = twenty files. The '-t' switch is provided to ls so that the files are ordered with the most recent at the top. For a more 'find' like output the following can be used. print -rl **/*(om[1,20])

example of the use of zsh glob qualifiers: "@" = the symlink qualifier "[1]" = first element :t = remove leading path components, leaving the tail

A method for aquiring the ip address using zsh. If you prefer the use of iproute2 (which, frankly, you should) then the following should provide the same (ip outputs CIDR addresses): print ${$(ip -o -4 a s eth0)[4]} we could also pass a qualifier to take only the IP and not the (CIDR) mask print ${$(ip -o -4 a s eth0)[4]:h} or, similarly, for the MAC address: print ${$(ip l l eth0)[15]}

zsh: "**/*" = recursive "(.Lm+100)" "." = files, "L" = filesize glob qualifier, "m" = mb, "+100" = 100

example of zsh globbing and glob qualifiers: "**/*" recursive (.m0) '.' = regular file, 'm0' = modified zero days (so, today).

replace (any number of) space[s] with underscore. Show Sample Output

zsh: add leading zero ... altogether pointless, as there can only be a maximum of 10 'single digit' files, and so a maximum of 10 files the command can act on. Padding further zeros will produce '0010', '001' and so break sequance. The only proper method is to itterate the numbers like so: i=1; for f (*) zmv $f '${(l:3::0:)$((++i))}'.txt but this has the unfortunate side effect of incrementing the values by 1 ... which may not be desirable. Show Sample Output

calculate if "$1" is a number ... decimals included :)

example of using zsh extended globbing

zsh: list of files sorted by size, greater than 100mb, head the top 5. '**/*' is recursive, and the glob qualifiers provide '.' = regular file, 'L' size, which is followed by 'm' = 'megabyte', and finally '+100' = a value of 100

Requires zsh. You might also do the following: for (*.txt) mv $i ${i/.txt/.csv} or I imagine the following will work in bash: for i in "*.txt" ; do mv $i ${i/.txt/.csv} ; done

zsh example using a 'for' loop and arithmetic expression: files matching the pattern '*.jpg' are renamed with a 3 digit prefix, keeping the previous filename and suffix. Show Sample Output

The 'sample output' shows the file(s) found and the line at which '' was found (for the example I used the 'string'.) Show Sample Output