From wikipedia Bash When Bash starts, it executes the commands in a variety of different scripts. When Bash is invoked as an interactive login shell, it first reads and executes commands from the file /etc/profile, if that file exists. After reading that file, it looks for ~/.bash_profile, ~/.bash_login, and ~/.profile, in that order, and reads … Read more
CLOSE_WAIT means your program is still running, and hasn’t closed the socket (and the kernel is waiting for it to do so). Add -p to netstat to get the pid, and then kill it more forcefully (with SIGKILL if needed). That should get rid of your CLOSE_WAIT sockets. You can also use ps to find … Read more
The mktemp(1) man page explains it fairly well: Traditionally, many shell scripts take the name of the program with the pid as a suffix and use that as a temporary file name. This kind of naming scheme is predictable and the race condition it creates is easy for an attacker to win. A safer, though … Read more
Actually awk is exactly the tool you should be looking into: ps axu | grep ‘[j]boss’ | awk ‘{print $5}’ or you can ditch the grep altogether since awk knows about regular expressions: ps axu | awk ‘/[j]boss/ {print $5}’ But if, for some bizarre reason, you really can’t use awk, there are other simpler … Read more
Use find: find . -maxdepth 1 -name “*string*” -print It will find all files in the current directory (delete maxdepth 1 if you want it recursive) containing “string” and will print it on the screen. If you want to avoid file containing ‘:’, you can type: find . -maxdepth 1 -name “*string*” ! -name “*:*” … Read more
Here is an explanation of the crontab format. # 1. Entry: Minute when the process will be started [0-60] # 2. Entry: Hour when the process will be started [0-23] # 3. Entry: Day of the month when the process will be started [1-28/29/30/31] # 4. Entry: Month of the year when the process will … Read more
Symbolic or soft link (files or directories, more flexible and self documenting) # Source Link ln -s /home/jake/doc/test/2000/something /home/jake/xxx Hard link (files only, less flexible and not self documenting) # Source Link ln /home/jake/doc/test/2000/something /home/jake/xxx More information: man ln /home/jake/xxx is like a new directory. To avoid “is not a directory: No such file or … Read more
A quick fix of your code: push 0x41414141 ; put ‘AAAA’ into stack memory mov ecx,esp ; pointer to the ‘AAAA’ mov eax, 4 ; write is syscall 4 for 32-bit Linux mov ebx, 1 ; stdout mov edx, 4 int 0x80 add esp,4 ; restore stack No explanation, as you should first check what … Read more
At ANSI compatible terminals, printing the sequence ESC[6n will report the cursor position to the application as (as though typed at the keyboard) ESC[n;mR, where n is the row and m is the column. Example: ~$ echo -e “\033[6n” EDITED: You should make sure you are reading the keyboard input. The terminal will “type” just … Read more
You can do it with eval. It may be ugly, but so is having to make a shell script for this. Plus, it’s all on one line. For example find -type f -exec bash -c “eval md5sum {} > {}.sum ” \;