linux_cmds.txt

export VISUAL=vi
crontab -e #edit the cronjob
crontab -l #tells you all the cron processes
ls            # list files
ls -la        # detailed list (hidden files too)
cd dir        # change directory
pwd           # show current path
mkdir dir     # create directory
mkdir -p a/b  # create nested directories
rm file       # delete file
rm -r dir     # delete directory
rm -rf dir    # force delete (dangerous)
cp a b        # copy file
cp -r a b     # copy directory
mv a b        # move/rename
stat file     # file details
tree          # directory tree view
Copy code
find . -name file.txt           # find file
grep "text" file.txt            # search text
grep -r "text" .                # recursive search
grep -i "text" file.txt         # case-insensitive
which python                    # find executable path
whereis python                  # binary + man path