Bash – How to Undo the Last cd Command

You don't need ; after then in then ;echo "{}" >>output.txt.

Use :

then echo "{}" >>output.txt

Also note that rather than playing with {} use positional parameters of shell (i am not familiar with svn so relying upon your commands) :

find /dir/containing/repos -maxdepth 2 -type d -exec bash -c 'if svnlook info /path/to/repo >/dev/null ;then echo "$1" >>output.txt ;svnadmin verify "$1" >>output.txt ;fi' _ {} \;

• if svnlook info /path/to/repo >/dev/null will run the command and redirect the STDOUT to /dev/null

• If the svnlook info /path/to/repo command is successful (exit code 0), then echo "$1" >>output.txt ;svnadmin verify "$1" >>output.txt commands will be run

• Here we are using the directory names {} as the fist argument ($1) to be processed by shell.

• _ here is just a placeholder indicating positional parameter 0 as bash -c command starts considering any further argument after the command starting from 0. As _ is the zero-th argument, we can use {} as the first argument. Check man bash to get more idea.

You can use for, which loops over the files in an ordered way, and allows us to avoid parsing the output of find or ls, to avoid issues with spaces and other special characters in filenames. Many thanks to @muru for improving this :)

i=0; j=$(stat ~/Documents/* --printf "%i\n" | wc -l); for k in ~/Documents/*; do if (( (j - ++i) < 8 )); then echo mv -v "$k" ~/AnotherDirectory; fi; done 

Test it first with echo, then remove echo to actually move the files.

As a script:

#!/bin/bash
i=0
j=$(stat ~/Documents/* --printf "%i\n" | wc -l )
for k in ~/Documents/*; do
  if (( (j - ++i) < 8 )); then
    echo mv -v -- "$k" ~/AnotherDirectory
  fi
done

again, remove echo after testing to move the files for real

Explanation

• i=0 telling the shell to start iterating at 0
• j=$(stat ~/Documents/* --printf "%i\n" | wc -l ) this is setting the variable j to an integer equal to the total number of files in the directory. Thanks to Serg's answer to my own question on how to count files reliably no matter what characters their names contain
• do if (( (j - ++i) < 8 )) for each iteration of the loop, test whether the outcome of j minus the number of times the loop has been run is less than 8 and if it is then
• mv -v -- "$k" ~/AnotherDirectory move the file to the new directory