Welcome to the wonderful world of portability… or rather the lack of it. Before we start analyzing these two options in detail and take a deeper look how different operating systems handle them, it should be noted that the BSD socket implementation is the mother of all socket implementations. Basically all other systems copied the … Read more
The reason this occurs is because bash actually expands the asterisk to every matching file, producing a very long command line. Try this: find . -name “*.pdf” -print0 | xargs -0 rm Warning: this is a recursive search and will find (and delete) files in subdirectories as well. Tack on -f to the rm command … Read more
Might not be one that 99% of Vim users don’t know about, but it’s something I use daily and that any Linux+Vim poweruser must know. Basic command, yet extremely useful. :w !sudo tee % I often forget to sudo before editing a file I don’t have write permissions on. When I come to save that … Read more
Use the shell globbing syntax: grep pattern -r –include=\*.cpp –include=\*.h rootdir The syntax for –exclude is identical. Note that the star is escaped with a backslash to prevent it from being expanded by the shell (quoting it, such as –include=”*.cpp”, would work just as well). Otherwise, if you had any files in the current working … Read more
Here’s what you need: public static DateTime UnixTimeStampToDateTime( double unixTimeStamp ) { // Unix timestamp is seconds past epoch DateTime dateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc); dateTime = dateTime.AddSeconds( unixTimeStamp ).ToLocalTime(); return dateTime; } Or, for Java (which is different because the timestamp is in milliseconds, not seconds): public static … Read more
Try: diff –brief –recursive dir1/ dir2/ Or alternatively, with the short flags -qr: diff -qr dir1/ dir2/ If you also want to see differences for files that may not exist in either directory: diff –brief –recursive –new-file dir1/ dir2/ # with long options diff -qrN dir1/ dir2/ # with short flag aliases
You would have to run this as root, but: for user in $(cut -f1 -d: /etc/passwd); do crontab -u $user -l; done will loop over each user name listing out their crontab. The crontabs are owned by the respective users so you won’t be able to see another user’s crontab w/o being them or root. … Read more
Use readlink: readlink -f file.txt
Underneath the file system, files are represented by inodes. (Or is it multiple inodes? Not sure.) A file in the file system is basically a link to an inode. A hard link, then, just creates another file with a link to the same underlying inode. When you delete a file, it removes one link to … Read more
Recent versions of GNU Grep (>= 2.5.2) provide: –exclude-dir=dir which excludes directories matching the pattern dir from recursive directory searches. So you can do: grep -R –exclude-dir=node_modules ‘some pattern’ /path/to/search For a bit more information regarding syntax and usage see The GNU man page for File and Directory Selection A related StackOverflow answer Use grep … Read more