quota | Display disk usage and limits |
quotacheck | Scan a file system for disk usage |
quotactl | Set disk quotas |
ram | ram disk device |
rcp | Copy files between two machines |
read | Read a line from standard input |
readarray | Read from stdin into an array variable |
readonly | Mark variables/functions as readonly |
reboot | Reboot the system |
remsync | Synchronize remote files via email |
rename | Rename files |
renice | Alter priority of running processes |
return | Exit a shell function |
rev | Reverse lines of a file |
rm | Remove files |
rmdir | Remove folders |
rsync | Remote file copy (Synchronize file trees) |
scp | Secure copy (remote file copy) |
screen | Multiplex terminal, run remote shells via ssh |
sdiff | Merge two files interactively |
sed | Stream Editor |
select | Accept keyboard input |
seq | Print numeric sequences |
set | Manipulate shell variables and functions |
sftp | Secure File Transfer Program |
shift | Shift positional parameters |
shopt | Shell Options |
shutdown | Shutdown or restart linux |
sleep | Delay for a specified time |
slocate | Find files |
sort | Sort text files |
source | Run commands from a file |
split | Split a file into fixed-size pieces |
ssh | Secure Shell client (remote login program) |
strace | Trace system calls and signals |
su | Substitute user identity |
sudo | Execute a command as another user |
sum | Print a checksum for a file |
suspend | Suspend execution of this shell |
symlink | Make a new name for a file |
sync | Synchronize data on disk with memory |
tail | Output the last part of file |
tar | Tape Archiver |
tee | Redirect output to multiple files |
test | Evaluate a conditional expression |
time | Measure Program running time |
times | User and system times |
top | List processes running on the system |
touch | Change file timestamps |
tr | Translate, squeeze, and/or delete characters |