Unix & Linux help chat. Unix & Linux Meta ... what is >> symbol and >& in unix/Linux? [duplicate] Ask ...

2012年9月14日 · In Bash, there appear to be several variables which hold special, consistently-meaning values. For instance, ./myprogram &; echo $! will return the PID of the process which backgrounded myprog...

I have a filename which ends with .zip and I wanted just the filename without zip. Here I found a trick in bash.

I used history | less to get the lines of previous commands and from the numbers on the left hand side I found the line I wanted repeated (eg. 22) and did !22 at the command prompt and it work...

2012年4月3日 · * Note: Word splitting. The shell splits tokens based on the contents of the IFS environment variable. Its default value is \t\n; i.e., whitespace, tab, and newline.

2009年10月12日 · LF (\n) stands for LINE FEED. It creates a new line, but it doesn't put the cursor at the beginning of that line. The cursor stays back at the end of the last line. This is how Unix (including macOS) and Linux work. CRLF (\r\n) creates a new line as well as puts the cursor at the beginning of the new line. This is how we see it in Windows OS.

2008年8月29日 · If your .so file is in elf format, you can use readelf program to extract symbol information from the binary. This command will give you the symbol table: readelf -Ws /usr/lib/libexample.so You only should extract those that are defined in this .so file, not in the libraries referenced by it. Seventh column should contain a number in this case.

2013年12月12日 · Hi guys, Im new to unix; I have a problem at hand. Somehow at the terminal, I lost the command prompt, instead I get a ">" symbol. Anything I type in does me no good. What do you recommend? Thank you for your help. (3 Replies)

It's a Bash feature called "tilde expansion".It's a function of the shell, not the OS. You'll get different behavior with csh, for example.

2019年11月4日 · POSIXly (portably among Unix-like systems), if you want to print arbitrary sequences of bytes, you'll want to use printf and the octal notation. \xE2\x9C\x94 (the UTF-8 encoding of U+2714) would be printed on a line portably with: printf '\342\234\224\n' And if you wanted it to be converted to the correct encoding for the locale, that would be: