| pwd |
tells what directory you're in |
cmd --version |
what version of cmd is being used? |
| apropos foo |
tells all commands that deal with foo |
| ls -al |
list all files, including hidden files, and display file information |
| which foo |
tells path to binary foo (if foo is in path) |
| whereis foo |
finds files or directories names 'foo' |
| locate foo |
finds directories or files whose names contain 'foo' |
| find . -type f -print| xargs grep "stuff"
/dir |
applies grep to a whole tree (/dir in this case) |
| find /dir -name filename |
finds filename in /dir |
| more /proc/cpuinfo |
in Linux, returns processor type, processor speed, cache size, etc. |
| more /proc/meminfo |
in Linux, returns information on memory |
| uname |
returns operating system |
| more /etc/issue |
in Linux, gives operating system information |
| hostname |
returns name of machine |
| host -n machine |
gives IP address of machine |
| rusers -l |
tells who's on the network |
| nslookup hsph.harvard.edu |
returns IP number |
| nslookup 134.174.190.44 |
returns hostname |
| rwho |
similar to rusers |
| df -l /dir |
amount of free disk space in /dir |
| du -l /dir |
amount of used space in /dir |
| du -h /dir |
amount of used space in human-readable form |
