Unix Commands Flashcards
pwd
print working directory
hostname
my computer’s network name
mkdir
make directory [-p create intermediaries, -v verbose list created]
cd
change directory [no args home dir, ~ home dir]
ls
list directory [-a list all, -l long / detail format, -R recurse subdir]
rmdir
remove directory
pushd
push directory (save where I am, then go here)
popd
pop directory (return to saved dir)
touch
update mod and access time, or create new empty file
cp
copy a file or directory [-i prompt on overwrite, -n do not overwrite, -R copy subdirs]
mv
rename a file, move a file or directory [-i prompt on overwrite, -n do not overwrite]
rm
remove a file or directory [-r recursively remove files and dir]
more
scroll through a file
less
page through a file, backwards too
cat
stream file(s) to stdout [-n number the lines]
pipe (|)
output of one command to input of following command
redirect out (>)
write output of a command to a file
redirect in (<)
use file as input for a command
append output (»)
appends output of command to the file
xargs
collect/execute arguments, for other command
find
find files [provide start path, -name filename”]
grep
find things inside files [-i ignore case, -r recurse subdirs (may not work)]
man
rtfm - read a manual page
apropos
find what man page is appropriate
whatis
brief description of command
env
look at your environment
echo
write argument(s) to stdout
export
set a new environment variable
unset
unset an environment variable
sudo
become super user root DANGER!
exit
exit the shell
chmod
change permission modifiers
chown
change ownership
which
determine which program/command executes in path
print working directory
pwd
my computer’s network name
hostname
make directory [-p create intermediaries, -v verbose list created]
mkdir
change directory [no args home dir, ~ home dir]
cd
list directory [-a list all, -l long / detail format, -R recurse subdir]
ls
remove directory
rmdir
push directory (save where I am, then go here)
pushd
pop directory (return to saved dir)
popd
update mod and access time, or create new empty file
touch
copy a file or directory [-i prompt on overwrite, -n do not overwrite, -R copy subdirs]
cp
rename a file, move a file or directory [-i prompt on overwrite, -n do not overwrite]
mv
remove a file or directory [-r recursively remove files and dir]
rm
scroll through a file
more
page through a file, backwards too
less
stream file(s) to stdout [-n number the lines]
cat
output of one command to input of following command
pipe (|)
write output of a command to a file
redirect out (>)
use file as input for a command
redirect in (<)
appends output of command to the file
append output (»)
execute arguments
xargs
find files [provide start path, -name filename]
find
find things inside files [-i ignore case, -r recurse subdirs (may not work)]
grep
rtfm - read a manual page
man
find what man page is appropriate
apropos
brief description of command
whatis
look at your environment
env
write argument(s) to stdout
echo
set a new environment variable
export
remove an environment variable
unset
become super user root DANGER!
sudo
exit the shell
exit
change permission modifiers
chmod
change ownership
chown
jobs
List current running processes
List current running processes
jobs
open
Opens given file using default program (uses finder when a dir)
Opens given file using default program (uses finder when a dir)
open
