Difference between revisions of "Useful Linux commands"
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| + | == diskutil == | ||
| + | |||
| + | diskutil unmount /dev/disk1s2 <ref>http://osxdaily.com/2013/05/13/mount-unmount-drives-from-the-command-line-in-mac-os-x/</ref> | ||
| + | |||
| + | == rsync == | ||
| + | |||
| + | <code> | ||
| + | --chown=USER:GROUP | ||
| + | </code> | ||
| + | |||
| + | This option forces all files to be owned by USER with group GROUP. This is a simpler interface than using --usermap and --groupmap directly, but it is implemented using those options internally, so you cannot mix them. If either the USER or GROUP is empty, no mapping for the omitted user/group will occur. If GROUP is empty, the trailing colon may be omitted, but if USER is empty, a leading colon must be supplied.<ref>https://download.samba.org/pub/rsync/rsync.html</ref> | ||
| + | |||
| + | == chown == | ||
| + | |||
| + | <code> | ||
| + | chown -R nobody:users /mnt/disk1/Download <ref>https://wiki.unraid.net/Un-Official_UnRAID_Manual</ref> | ||
| + | </code> | ||
| + | |||
== grep == | == grep == | ||
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* shows a tree of processes! <ref>https://www.howtoforge.com/linux-pstree-command/</ref> | * shows a tree of processes! <ref>https://www.howtoforge.com/linux-pstree-command/</ref> | ||
| + | |||
| + | == du -sh foldername == | ||
| + | |||
| + | * (h)uman readable (s)ummary for disk usage of foldername <ref>https://www.ostechnix.com/find-size-directory-linux/</ref> | ||
| + | |||
| + | == lsof -ad3-999 -c rsync == | ||
| + | |||
| + | * to see what files rsync currently has opened <ref>https://askubuntu.com/questions/323775/monitor-watch-running-rsync-process/323782</ref> | ||
== References == | == References == | ||
<references /> | <references /> | ||
Latest revision as of 14:29, 5 March 2019
Contents
diskutil[edit]
diskutil unmount /dev/disk1s2 [1]
rsync[edit]
--chown=USER:GROUP
This option forces all files to be owned by USER with group GROUP. This is a simpler interface than using --usermap and --groupmap directly, but it is implemented using those options internally, so you cannot mix them. If either the USER or GROUP is empty, no mapping for the omitted user/group will occur. If GROUP is empty, the trailing colon may be omitted, but if USER is empty, a leading colon must be supplied.[2]
chown[edit]
chown -R nobody:users /mnt/disk1/Download [3]
grep[edit]
grep -nr 'yourString*' .
The dot at the end searches the current directory. Meaning for each parameter:
-n Show relative line number in the file 'yourString*' String for search, followed by a wildcard character -r Recursively search subdirectories listed . Directory for search (current directory)
How to grep ps output with headers [4][edit]
ps -ef | egrep "Download|PID"
FreeBSD[edit]
- su:
The su utility requests appropriate user credentials via PAM and switches
to that user ID (the default user is the superuser). A shell is then
executed.
pstree[edit]
- shows a tree of processes! [5]
du -sh foldername[edit]
- (h)uman readable (s)ummary for disk usage of foldername [6]
lsof -ad3-999 -c rsync[edit]
- to see what files rsync currently has opened [7]
References[edit]
- ↑ http://osxdaily.com/2013/05/13/mount-unmount-drives-from-the-command-line-in-mac-os-x/
- ↑ https://download.samba.org/pub/rsync/rsync.html
- ↑ https://wiki.unraid.net/Un-Official_UnRAID_Manual
- ↑ https://serverfault.com/questions/268757/how-to-grep-ps-output-with-headers
- ↑ https://www.howtoforge.com/linux-pstree-command/
- ↑ https://www.ostechnix.com/find-size-directory-linux/
- ↑ https://askubuntu.com/questions/323775/monitor-watch-running-rsync-process/323782
